What is the best Light Cone for Castorice?

To Evernight's Stars is the closest fit on the data: it is a 5-star Remembrance Light Cone with 529 base ATK at level 80, and its passive acts on HP. The Story's Next Page is the best 4-star alternative.

Which Planar Ornament should Castorice use?

Fleet of the Ageless. Its 2-piece bonus is: Increases the wearer's Max HP by 12%. When the wearer's SPD reaches 120 or higher, all allies' ATK increases by 8%. Planar Ornaments have no 4-piece bonus; the sphere and the rope are the whole set.

Castorice, Quantum Remembrance character | Honkai: Star Rail

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Amphoreus

Castorice Build

Build guide · Honkai: Star Rail

QuantumRemembranceSustain

English voice: Melody Muze

The best Castorice build in Honkai: Star Rail (Version 4.6) is Make Farewells More Beautiful with Poet of Mourning Collapse. Updated November 5, 2026

Abilities Traces Materials Eidolons

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

7 ranked

Make Farewells More Beautiful, 5★ Remembrance Light Cone | Honkai: Star Rail

BISMake Farewells More Beautiful

123.10% at S1

529

Base ATK · lv 80

1270 HP397 DEF

The Flower Remembers, 4★ Remembrance Light Cone | Honkai: Star Rail

#2The Flower Remembers

109.04% at S5

529

Base ATK · lv 80

1058 HP331 DEF

Sweat Now, Cry Less, 4★ Remembrance Light Cone | Honkai: Star Rail

#3Sweat Now, Cry Less

107.48% at S5

529

Base ATK · lv 80

1058 HP198 DEF

Time Waits for No One, 5★ Abundance Light Cone | Honkai: Star Rail

#4Time Waits for No One

93.23% at S1

476

Base ATK · lv 80

1270 HP463 DEF

The Story's Next Page, 4★ Remembrance Light Cone | Honkai: Star Rail

#5The Story's Next Page

92.65% at S5

370

Base ATK · lv 80

1058 HP397 DEF

Relics

2 sets

CorePoet of Mourning Collapse

Castorice can naturally be played on the slower side because of her kit and free 40% Speed boost in combat, which doesn't interfere with the 4P set bonus. All this makes this set almost purely upside and the highest priority to farm if you aren't using it yet.

2PCIncreases Quantum DMG by 10%.

4PCDecreases the wearer's SPD by 8%. Before entering battle, if the wearer's SPD is lower than 110/95, increases the wearer's CRIT Rate by 20%/32%. This effect applies to the wearer's memosprite at the same time.

Also works

Scholar Lost in Erudition

Planar ornaments

Sphere and rope · 2-piece only

CoreBone Collection's Serene Demesne

The natural choice for Castorice as most other options either don't affect her memosprite or have unsuitable stats.

2PCIncreases the wearer's Max HP by 12%. When the wearer's Max HP is 5000 or higher, increases the wearer's and their memosprite's CRIT DMG by 28%.

Also works

Main stats

Body: CRIT DMG > HP%
Feet: HP%
Planar Sphere: HP% > Quantum DMG
Link Rope: HP%

Substat priority

Highest first

1CRIT DMG = CRIT RateBest
2HP%
3SPD (Less than 95)

Trace priority

Level in this order

#1
Memo Skill = Memo Talent
Max first
#2
Ultimate = Talent
Then
#3
Skill
Next
#4
Basic
Later

Major traces, best first: Contained Dark Tide (A2) > Where The West Wind Dwells (A6) > Inverted Torch (A4)

Best Eidolons

E3 and E5 raise levels only

E1Snowbound Maiden, Memory to Tomb
E2Crown on Wings of Bloom
E3Level bump
E4Rest in Songs of Gloom
E5Level bump
E6Await for Years to Loom

E1
Snowbound Maiden, Memory to Tomb
Game text
When the enemy target's current HP is 80%/50% of Max HP or lower, the DMG dealt to it by "Boneclaw, Doomdrake's Embrace," "Claw Splits the Veil," "Breath Scorches the Shadow," and "Wings Sweep the Ruins" is 120%/140% of the original DMG respectively.
E2
Crown on Wings of Bloom
Game text
After summoning the memosprite Netherwing, Castorice gains 2 stack(s) of "Ardent Will." "Ardent Will" can stack up to 2 time(s) and can be used to offset the HP cost of Netherwing's Memosprite Skill, "Breath Scorches the Shadow" and advance Castorice's action by 100%. When using the next Enhanced Skill, Castorice gains "Newbud" by an amount equal to 30% of max "Newbud."
E4
Rest in Songs of Gloom
Game text
While Castorice is on the field, all allies' HP restored when receiving healing increases by 20%.
E6
Await for Years to Loom
Game text
When Castorice or Netherwing deals DMG, increases Quantum RES PEN by 20%. During Netherwing's attacks, can reduce enemy Toughness regardless of Weakness Types. When breaking Weaknesses, triggers the Quantum Weakness Break effect. And the number of Bounces for Netherwing's Talent "Wings Sweep the Ruins" additionally increases by 3.

Teams

1 team

Castorice team

Quantum · RemembranceLeads

Castorice pays HP for her memosprite, so the line-up pairs a healer who profits from that with two Harmony units that raise the memosprite’s own damage.

Castorice, this characterMain DPS
TribbieHarmony buffer
Ruan MeiHarmony buffer
HyacineSustain

All teams, with every replacement

Honkai: Star Rail 5★ Quantum Remembrance Sustain

Castorice build summary

Updated November 5, 2026

Make Farewells More Beautiful tops the light cone ranking for Castorice, at 123.10% relative damage at S1, ahead of The Flower Remembers, Sweat Now, Cry Less and Time Waits for No One. That order is prydwen.gg's, measured in play and rephrased here; every row of it sits under Light cones below.

Run Poet of Mourning Collapse on Castorice, with Scholar Lost in Erudition behind it. The planar ornament is Bone Collection's Serene Demesne. Main stats are CRIT DMG > HP% body, HP% feet, HP% > Quantum DMG sphere, HP% rope. Roll substats in the order CRIT DMG = CRIT Rate > HP% > SPD (Less than 95).

Trace priority is Memo Skill = Memo Talent > Ultimate = Talent > Skill > Basic.

The strongest team is Castorice, Tribbie, Ruan Mei and Hyacine, built around Castorice: Quantum · Remembrance.

Role: Sustain
Best light cone: Make Farewells More Beautiful
Alternatives: The Flower Remembers, Sweat Now, Cry Less, Time Waits for No One
Relic set: Poet of Mourning Collapse
Planar ornament: Bone Collection's Serene Demesne
Main stats: CRIT DMG > HP% body, HP% feet, HP% > Quantum DMG sphere, HP% rope
Substat priority: CRIT DMG = CRIT Rate > HP% > SPD (Less than 95)
Trace priority: Memo Skill = Memo Talent > Ultimate = Talent > Skill > Basic
Best team: Castorice, Tribbie, Ruan Mei, Hyacine
Key ascension material: 65× Darkveil Moonlight
Last updated: November 5, 2026

Castorice build FAQ

What is the best Light Cone for Castorice?: To Evernight's Stars is the closest fit on the data: it is a 5-star Remembrance Light Cone with 529 base ATK at level 80, and its passive acts on HP. The Story's Next Page is the best 4-star alternative.
Which relic set should Castorice use?: Poet of Mourning Collapse. Its 2-piece bonus is: Increases Quantum DMG by 10%. Its 4-piece bonus is: Decreases the wearer's SPD by 8%. Before entering battle, if the wearer's SPD is lower than 110/95, increases the wearer's CRIT Rate by 20%/32%. This effect applies to the wearer's memosprite at the same time.
Which Planar Ornament should Castorice use?: Fleet of the Ageless. Its 2-piece bonus is: Increases the wearer's Max HP by 12%. When the wearer's SPD reaches 120 or higher, all allies' ATK increases by 8%. Planar Ornaments have no 4-piece bonus; the sphere and the rope are the whole set.

Castorice Build

Light cones

Relics

Planar ornaments

Main stats

Substat priority

Trace priority

Best Eidolons

Snowbound Maiden, Memory to Tomb

Crown on Wings of Bloom

Rest in Songs of Gloom

Await for Years to Loom

Teams

Castorice build FAQ