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Rappa — Imaginary Erudition character | Honkai: Star Rail

Galaxy Ranger

Rappa

Build guide · Honkai: Star Rail

5-star
ImaginaryEruditionMain DPS

English voice: Kendell Byrd

The best Rappa build in Honkai: Star Rail (Version 4.4) is Ninjutsu Inscription: Dazzling Evilbreaker with Iron Cavalry Against the Scourge. Updated August 28, 2026

Where these rankings come fromThe light cone order, relic sets and stat priorities on this tab are prydwen.gg’s, measured in play and rephrased. Relative damage figures are ratios against the bottom of each ranking, not absolute numbers, and each one holds only for the superimposition and team its row states. Everything else — base stats, passive text, material totals — is read from the game’s own data.

Light cones

Relics

Planar ornaments

Main stats

Body
ATK%
Feet
Speed
Planar Sphere
ATK%
Link Rope
Break Effect >= Energy Regen Rate

Substat priority

  1. 1SPD (Until Desired Breakpoint)Best
  2. 2Break Effect
  3. 3ATK%

Trace priority

  1. #1

    Talent

    Max first

  2. #2

    Ultimate

    Then

  3. #3

    Basic

    Next

  4. #4

    Skill

    Later

Major traces, best first: Ninjutsu Inscription: Sea Echo (A4) > Ninjutsu Inscription: Withered Leaf (A6) > Ninjutsu Inscription: Sky High (A2)

Best Eidolons

  1. Rappa E1 Returned Is the Revenant With No Ferry Toll — Eidolon | Honkai: Star RailE1
  2. Rappa E2 Free Is the Mind Enlightened by Haikus — Eidolon | Honkai: Star RailE2
  3. Rappa E3 Many Are the Shrines That Repel No Hell — Eidolon | Honkai: Star RailE3
  4. Rappa E4 Lost Is the Nindō Devoured by Time — Eidolon | Honkai: Star RailE4
  5. Rappa E5 Steady Is The Ranger With Unerring Arrows — Eidolon | Honkai: Star RailE5
  6. Rappa E6 Righteous Is the Wrath That Spares No Evil — Eidolon | Honkai: Star RailE6
  1. Rappa E1 Returned Is the Revenant With No Ferry Toll — Eidolon | Honkai: Star RailE1

    Returned Is the Revenant With No Ferry Toll

    Game text

    During the "Sealform" state entered by using Ultimate, DMG dealt by Rappa ignores 15% of the targets' DEF. After exiting the "Sealform" state, regenerates 20 Energy.

  2. Rappa E2 Free Is the Mind Enlightened by Haikus — Eidolon | Honkai: Star RailE2

    Free Is the Mind Enlightened by Haikus

    Game text

    The Enhanced Basic ATK's first 2 hits have their Toughness Reduction against the one designated enemy increased by 50%.

  3. Rappa E4 Lost Is the Nindō Devoured by Time — Eidolon | Honkai: Star RailE4

    Lost Is the Nindō Devoured by Time

    Game text

    While in the "Sealform" state, increases all allies' SPD by 12%.

  4. Rappa E6 Righteous Is the Wrath That Spares No Evil — Eidolon | Honkai: Star RailE6

    Righteous Is the Wrath That Spares No Evil

    Game text

    When battle starts, Rappa gains 5 point(s) of her Talent's Charge, and its upper limit increases by 5 point(s). After launching the third hit of "Ningu: Demonbane Petalblade," gains 5 point(s) of Charge.

Teams

Rappa team

Imaginary · BreakLeads

Break damage across a whole wave rather than one target, so both Harmony slots go to Break amplification and the sustain adds Break of its own.

  1. Rappa — Imaginary Erudition character | Honkai: Star RailRappa — this characterMain DPS
  2. Ruan Mei — Ice Harmony character | Honkai: Star RailRuan MeiBreak amplifier
  3. Trailblazer (Harmony) — Imaginary Harmony character | Honkai: Star RailTrailblazer (Harmony)Break support
  4. Lingsha — Fire Abundance character | Honkai: Star RailLingshaSustain · Break

All teams, with every replacement

Honkai: Star Rail 5★ Imaginary Erudition Main DPS

Rappa build summary

Updated August 28, 2026

Ninjutsu Inscription: Dazzling Evilbreaker tops the light cone ranking for Rappa, at 120.11% relative damage at S1, ahead of After the Charmony Fall, Eternal Calculus and Make the World Clamor. That order is prydwen.gg's, measured in play and rephrased here; every row of it sits under Light cones below.

Run Iron Cavalry Against the Scourge on Rappa, with Thief of Shooting Meteor and Eagle of Twilight Line behind it. The planar ornament is Talia: Kingdom of Banditry. Main stats are ATK% body, Speed feet, ATK% sphere, Break Effect >= Energy Regen Rate rope. Roll substats in the order SPD (Until Desired Breakpoint) > Break Effect > ATK%.

Trace priority is Talent > Ultimate > Basic > Skill. The Ultimate costs 140 energy, which is what an Energy Regeneration Rate target has to clear.

The strongest team is Rappa, Ruan Mei, Trailblazer (Harmony) and Lingsha, built around Rappa — Imaginary · Break.

Role
Main DPS / Support
Main stats
ATK% body, Speed feet, ATK% sphere, Break Effect >= Energy Regen Rate rope
Substat priority
SPD (Until Desired Breakpoint) > Break Effect > ATK%
Trace priority
Talent > Ultimate > Basic > Skill
Ultimate energy cost
140 energy
Key ascension material
65× Chordal Mirage
Last updated
August 28, 2026

Abilities

Rappa Ninjutsu: Rise Above Tumbles — basic atk icon | Honkai: Star Rail
Basic

Ninjutsu: Rise Above Tumbles

  • Single Target
  • +20 energy
  • 30 Toughness

Deals Imaginary DMG equal to 100% of Rappa's ATK to one designated enemy.

Ability level

6 is the cap from trace materials; Eidolons add the rest.

Basic ATK DMG
100%
All 10 levels
Attribute12345678910
Basic ATK DMG50%60%70%80%90%100%110%120%130%140%
Rappa Ningu: Demonbane Petalblade — basic atk icon | Honkai: Star Rail
Basic

Ningu: Demonbane Petalblade

  • Blast
  • 75 Toughness

Launches "Ningu: Demonbane Petalblade." The first 2 hits deal Imaginary DMG equal to 100% of Rappa's ATK to one designated enemy and Imaginary DMG equal to 50% of Rappa's ATK to adjacent targets, and the 3rd hit deals Imaginary DMG equal to 100% of Rappa's ATK to all enemies. Enhanced Basic ATK will not recover Skill Points. Attacking enemies that don't have Imaginary Weakness can also reduce Toughness, whose effect is equal to 50% of the original Toughness Reduction. When Breaking Weakness, triggers the Imaginary Weakness Break effect.

Ability level

6 is the cap from trace materials; Eidolons add the rest.

Basic ATK DMG
100%
Adjacent DMG
50%
AoE DMG
100%
All 10 levels
Attribute12345678910
Basic ATK DMG60%68%76%84%92%100%108%116%124%132%
Adjacent DMG30%34%38%42%46%50%54%58%62%66%
AoE DMG60%68%76%84%92%100%108%116%124%132%
Rappa Ninja Strike: Rooted Resolute — skill icon | Honkai: Star Rail
Skill

Ninja Strike: Rooted Resolute

  • AoE
  • +30 energy
  • 30 Toughness

Deals Imaginary DMG equal to 120% of Rappa's ATK to all enemies.

Ability level

10 is the cap from trace materials; Eidolons add the rest.

AoE DMG
120%
All 15 levels
Attribute123456789101112131415
AoE DMG60%66%72%78%84%90%98%105%113%120%126%132%138%144%150%
Rappa Nindō Supreme: Aishiteru — ultimate icon | Honkai: Star Rail
Ultimate

Nindō Supreme: Aishiteru

  • Enhance
  • +5 energy

Enters the "Sealform" state, immediately gains 1 extra turn, obtains 3 points of "Chroma Ink," and increases Weakness Break Efficiency by 50% and Break Effect by 30%. While in the "Sealform" state, Basic ATK is enhanced, and Skill and Ultimate cannot be used. After using Enhanced Basic ATK, consumes 1 point of "Chroma Ink." When "Chroma Ink" is depleted, exits the "Sealform" state.

Ability level

10 is the cap from trace materials; Eidolons add the rest.

Break Effect Boost
30%
All 15 levels
Attribute123456789101112131415
Break Effect Boost10%12%14%16%18%20%23%25%28%30%32%34%36%38%40%
Rappa Ninja Tech: Endurance Gauge — talent icon | Honkai: Star Rail
Talent

Ninja Tech: Endurance Gauge

  • Enhance
  • 6 Toughness

Each time the enemy target is Weakness Broken, Rappa gains 1 point of Charge, up to a max of 10 points of Charge. When Rappa next launches the third hit of "Ningu: Demonbane Petalblade," additionally deals Break DMG equal to 60% of Rappa's Imaginary Break DMG to all enemies. This DMG can ignore Weakness Type to reduce 2 Toughness, consuming all Charge. Each point of Charge increases the Break DMG multiplier by 50% and increases the Toughness Reduction that can ignore Weakness Type by 1. When Breaking Weakness, triggers the Imaginary Weakness Break effect.

Ability level

10 is the cap from trace materials; Eidolons add the rest.

AoE DMG
60%
Talent DMG
50%
All 15 levels
Attribute123456789101112131415
AoE DMG30%33%36%39%42%45%49%53%56%60%63%66%69%72%75%
Talent DMG25%28%30%33%35%38%41%44%47%50%53%55%57%60%63%

Technique and fixed effects

Rappa Ningu: Demonbane Petalblade — basic atk icon | Honkai: Star Rail
Basic

Ningu: Demonbane Petalblade

  • Blast
  • +5 energy
  • 30 Toughness
Rappa Ningu: Demonbane Petalblade — basic atk icon | Honkai: Star Rail
Basic

Ningu: Demonbane Petalblade

  • Blast
  • +5 energy
  • 30 Toughness
Rappa Ningu: Demonbane Petalblade — basic atk icon | Honkai: Star Rail
Basic

Ningu: Demonbane Petalblade

  • AoE
  • +10 energy
  • 15 Toughness
Rappa Ninja Dash: By Leaps and Bounds — technique icon | Honkai: Star Rail
Technique

Ninja Dash: By Leaps and Bounds

  • Enhance
  • 90 Toughness

After using Technique, enters the "Graffiti" state for 20 seconds. While in the "Graffiti" state, moves forward rapidly for a set distance and attacks any enemies touched. During the rapid movement, can block all enemies' attacks. Using an attack in the "Graffiti" state can end the state's duration early. After entering combat via attacking enemies, deals 30 Toughness Reduction regardless of Weakness Type and Break DMG equal to 200% of Rappa's Imaginary Break DMG to each enemy target, and deals Break DMG equal to 180% of Rappa's Imaginary Break DMG to adjacent targets. At the same time, this unit regenerates 10 Energy.

Bonus Abilities

  1. Rappa Ninjutsu Inscription: Sky High — Bonus Ability icon | Honkai: Star RailA2

    Ninjutsu Inscription: Sky High

    When the Weakness of an elite-level or higher enemy is broken, Rappa additionally gains 1 point(s) of Charge and regenerates 10 Energy.

  2. Rappa Ninjutsu Inscription: Sea Echo — Bonus Ability icon | Honkai: Star RailA4

    Ninjutsu Inscription: Sea Echo

    While in the "Sealform" state, after Rappa uses Enhanced Basic ATK to deal DMG to a Weakness Broken enemy target, converts the Toughness Reduction from this instance of DMG to 1 instance of 60% Super Break DMG.

  3. Rappa Ninjutsu Inscription: Withered Leaf — Bonus Ability icon | Honkai: Star RailA6

    Ninjutsu Inscription: Withered Leaf

    When an enemy target becomes Weakness Broken, increases the Break DMG taken by 2%. If Rappa's current ATK is higher than 2400, for every 100 excess ATK, additionally increases this value by 1%, up to a max additional increase of 8%. This effect lasts for 2 turn(s).

Stat traces

ATK
28.0%
SPD
9
Break Effect
13.3%

Totals at full unlock, summed across every node of that stat. Ascension rank gates the nodes as it gates the Bonus Abilities above.

Full bill

Level 80 and every ability maxed

2,265,500

Credits 12 material lines

Ascension to 80

308,000

Credits 4 materials · 6 steps

All 3 abilities maxed

1,957,500

Credits 3× the single-ability bill

Ascension

  1. Lv 30
    Dream Collection Component — ascension material | Honkai: Star RailDream Collection Component ×5

    4,000Credits

  2. Lv 40
    Dream Collection Component — ascension material | Honkai: Star RailDream Collection Component ×10

    8,000Credits

  3. Lv 50
    Chordal Mirage — ascension material | Honkai: Star RailChordal Mirage ×3
    Dream Flow Valve — ascension material | Honkai: Star RailDream Flow Valve ×6

    16,000Credits

  4. Lv 60
    Chordal Mirage — ascension material | Honkai: Star RailChordal Mirage ×7
    Dream Flow Valve — ascension material | Honkai: Star RailDream Flow Valve ×9

    40,000Credits

  5. Lv 70
    Chordal Mirage — ascension material | Honkai: Star RailChordal Mirage ×20
    Dream Making Engine — ascension material | Honkai: Star RailDream Making Engine ×6

    80,000Credits

  6. Lv 80
    Chordal Mirage — ascension material | Honkai: Star RailChordal Mirage ×35
    Dream Making Engine — ascension material | Honkai: Star RailDream Making Engine ×9

    160,000Credits

Total to level 80

308,000 Credits

Chordal Mirage — ascension material | Honkai: Star RailChordal Mirage ×65
Dream Making Engine — ascension material | Honkai: Star RailDream Making Engine ×15
Dream Flow Valve — ascension material | Honkai: Star RailDream Flow Valve ×15
Dream Collection Component — ascension material | Honkai: Star RailDream Collection Component ×15

Trace materials

  1. → 2
    Dream Collection Component — ascension material | Honkai: Star RailDream Collection Component ×3

    2,500Credits

  2. → 3
    Dream Collection Component — ascension material | Honkai: Star RailDream Collection Component ×6
    Rough Sketch — ascension material | Honkai: Star RailRough Sketch ×3

    5,000Credits

  3. → 4
    Dream Flow Valve — ascension material | Honkai: Star RailDream Flow Valve ×3
    Dynamic Outlining — ascension material | Honkai: Star RailDynamic Outlining ×3

    10,000Credits

  4. → 5
    Dream Flow Valve — ascension material | Honkai: Star RailDream Flow Valve ×4
    Dynamic Outlining — ascension material | Honkai: Star RailDynamic Outlining ×5

    20,000Credits

  5. → 6
    Dream Flow Valve — ascension material | Honkai: Star RailDream Flow Valve ×6
    Dynamic Outlining — ascension material | Honkai: Star RailDynamic Outlining ×7

    30,000Credits

  6. → 7
    Dream Making Engine — ascension material | Honkai: Star RailDream Making Engine ×3
    Exquisite Colored Draft — ascension material | Honkai: Star RailExquisite Colored Draft ×3

    45,000Credits

  7. → 8
    Dream Making Engine — ascension material | Honkai: Star RailDream Making Engine ×4
    Exquisite Colored Draft — ascension material | Honkai: Star RailExquisite Colored Draft ×5
    Lost Echo of the Shared Wish — ascension material | Honkai: Star RailLost Echo of the Shared Wish ×1

    80,000Credits

  8. → 9
    Tracks of Destiny — ascension material | Honkai: Star RailTracks of Destiny ×1
    Exquisite Colored Draft — ascension material | Honkai: Star RailExquisite Colored Draft ×8
    Lost Echo of the Shared Wish — ascension material | Honkai: Star RailLost Echo of the Shared Wish ×1

    160,000Credits

  9. → 10
    Tracks of Destiny — ascension material | Honkai: Star RailTracks of Destiny ×1
    Exquisite Colored Draft — ascension material | Honkai: Star RailExquisite Colored Draft ×14
    Lost Echo of the Shared Wish — ascension material | Honkai: Star RailLost Echo of the Shared Wish ×1

    300,000Credits

One ability maxed

652,500 Credits

Tracks of Destiny — ascension material | Honkai: Star RailTracks of Destiny ×2
Dream Making Engine — ascension material | Honkai: Star RailDream Making Engine ×7
Exquisite Colored Draft — ascension material | Honkai: Star RailExquisite Colored Draft ×30
Lost Echo of the Shared Wish — ascension material | Honkai: Star RailLost Echo of the Shared Wish ×3
Dream Flow Valve — ascension material | Honkai: Star RailDream Flow Valve ×13
Dynamic Outlining — ascension material | Honkai: Star RailDynamic Outlining ×15
Dream Collection Component — ascension material | Honkai: Star RailDream Collection Component ×9
Rough Sketch — ascension material | Honkai: Star RailRough Sketch ×3

All 3 abilities maxed

1,957,500 Credits

Tracks of Destiny — ascension material | Honkai: Star RailTracks of Destiny ×6
Dream Making Engine — ascension material | Honkai: Star RailDream Making Engine ×21
Exquisite Colored Draft — ascension material | Honkai: Star RailExquisite Colored Draft ×90
Lost Echo of the Shared Wish — ascension material | Honkai: Star RailLost Echo of the Shared Wish ×9
Dream Flow Valve — ascension material | Honkai: Star RailDream Flow Valve ×39
Dynamic Outlining — ascension material | Honkai: Star RailDynamic Outlining ×45
Dream Collection Component — ascension material | Honkai: Star RailDream Collection Component ×27
Rough Sketch — ascension material | Honkai: Star RailRough Sketch ×9

Rappa’s Eidolons

  1. Rappa E1 Returned Is the Revenant With No Ferry Toll — Eidolon | Honkai: Star RailE1

    Returned Is the Revenant With No Ferry Toll

    During the "Sealform" state entered by using Ultimate, DMG dealt by Rappa ignores 15% of the targets' DEF. After exiting the "Sealform" state, regenerates 20 Energy.

  2. Rappa E2 Free Is the Mind Enlightened by Haikus — Eidolon | Honkai: Star RailE2

    Free Is the Mind Enlightened by Haikus

    The Enhanced Basic ATK's first 2 hits have their Toughness Reduction against the one designated enemy increased by 50%.

  3. Rappa E3 Many Are the Shrines That Repel No Hell — Eidolon | Honkai: Star RailE3

    Many Are the Shrines That Repel No Hell

    Skill Lv. +2, up to a maximum of Lv. 15. Talent Lv. +2, up to a maximum of Lv. 15.

  4. Rappa E4 Lost Is the Nindō Devoured by Time — Eidolon | Honkai: Star RailE4

    Lost Is the Nindō Devoured by Time

    While in the "Sealform" state, increases all allies' SPD by 12%.

  5. Rappa E5 Steady Is The Ranger With Unerring Arrows — Eidolon | Honkai: Star RailE5

    Steady Is The Ranger With Unerring Arrows

    Ultimate Lv. +2, up to a maximum of Lv. 15. Basic ATK Lv. +1, up to a maximum of Lv. 10.

  6. Rappa E6 Righteous Is the Wrath That Spares No Evil — Eidolon | Honkai: Star RailE6

    Righteous Is the Wrath That Spares No Evil

    When battle starts, Rappa gains 5 point(s) of her Talent's Charge, and its upper limit increases by 5 point(s). After launching the third hit of "Ningu: Demonbane Petalblade," gains 5 point(s) of Charge.

Rappa FAQ

What Combat Type is Rappa?
Rappa is a 5-star Imaginary character on the Path of Erudition, from Galaxy Ranger, released in version 2.6.
What stat does Rappa scale on?
Rappa's abilities multiply ATK. That is read from the scaling rows on the Skill and Ultimate, not from the ability description, so it reflects what the game actually multiplies rather than what the text mentions.
What is the best Light Cone for Rappa?
Flickering Stars is the closest fit on the data: it is a 5-star Erudition Light Cone with 635 base ATK at level 80, and its passive acts on ATK. A Dream Scented in Wheat is the best 4-star alternative.
Which relic set should Rappa use?
Hero of Triumphant Song. Its 2-piece bonus is: Increases ATK by 12%. Its 4-piece bonus is: While the wearer's memosprite is on the field, increases the wearer's SPD by 6%. When the wearer's memosprite attacks, increases the wearer's and memosprite's CRIT DMG by 30%, lasting for 2 turn(s).
Which Planar Ornament should Rappa use?
Firmament Frontline: Glamoth. Its 2-piece bonus is: Increases the wearer's ATK by 12%. When the wearer's SPD is equal to or higher than 135/160, the wearer deals 12%/18% more DMG. Planar Ornaments have no 4-piece bonus; the sphere and the rope are the whole set.
How much does it cost to max Rappa's traces?
Taking one ability from level 1 to 10 costs 652,500 Credits and 2× Tracks of Destiny among other materials. The Materials tab lists every item per level.
What does Rappa E1 do?
Returned Is the Revenant With No Ferry Toll: During the "Sealform" state entered by using Ultimate, DMG dealt by Rappa ignores 15% of the targets' DEF. After exiting the "Sealform" state, regenerates 20 Energy.
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