Cerydra is a Wind-element character who follows the Path of Harmony, specializing as a single-target support that empowers one ally through Military Merit and Peerage. Military Merit is granted via her Skill or Ultimate, while Peerage is unlocked upon reaching six stacks of Charge, gained through her Skill, Ultimate, and whenever the ally with Military Merit uses their Ultimate. While Peerage is active, the chosen ally gains up to 72% increased CRIT DMG on their Skill and 10% All-Type RES PEN. In addition, when the ally with Peerage uses their Skill, it triggers Coup de Main, repeating the Skill once before consuming six Charge stacks and reverting Peerage back to Military Merit. Finally, Cerydra’s Skill also grants both herself and the chosen ally +20 SPD for 3 turns, further enhancing their combat effectiveness.
Best Cavern Relics
(2) Increases SPD by 6%.
(4) When using Skill or Ultimate on one ally target, increases the ability target's CRIT DMG by 18%, lasting for 2 turn(s). This effect can stack up to 2 time(s).
This is her best Cavern Relic set, as her single-target buff makes it easier for her to consistently trigger its CRIT DMG effect.
(2) Increases Wind DMG by 10%.
(4) After the wearer uses their Ultimate, their action is Advanced Forward by 25%.
This is her second-best set, primarily chosen to give Cerydra faster turns through its 4-piece effect.
(2) Increases SPD by 6%.
(4) When the wearer uses their Ultimate on an ally, SPD for all allies increases by 12% for 1 turn(s). This effect cannot be stacked.
This is a good alternative set that boosts the team’s SPD whenever Cerydra uses her Ultimate.
Best Planar Ornaments
(2) Increases the wearer's Energy Regeneration Rate by 5%. If the wearer is not the first character in the team lineup, then increases the ATK of the first character in the team lineup by 12%.
This is her best set, designed specifically to buff the character placed in the first team slot.
(2) Increases the wearer's Energy Regeneration Rate by 5%. When the wearer's SPD reaches 120 or higher, the wearer's action is Advanced Forward by 40% immediately upon entering battle.
This is a great alternative set that ensures Cerydra acts first at the start of battle.
(2) Increases the wearer's Effect RES by 10%. When the wearer's Effect RES is at 30% or higher, all allies' CRIT DMG increases by 10%.
This is a good alternative set that boosts the entire team’s CRIT DMG.
Best Stats

Body
ATK%

Boots
SPD

Sphere
ATK%

Rope
Energy Regeneration Rate
Substats
ATK% / SPD / CRIT DMG / Effect RES
info
Cerydra must have at least 4000 ATK, both in and out of battle, to achieve the maximum CRIT DMG buff from her Bonus Ability, Veni. She also needs 140+ SPD to ensure she acts first at the start of battle. Since she gains a 100% CRIT Rate boost from her Bonus Ability, Vidi, Cerydra does not need to invest in a CRIT Rate Body or substats.
Best Light Cones
SourceLight Cone Event Warp
Conquer
Increases the wearer's ATK by 64~128%. After using Ultimate to attack, recovers 1 Skill Point(s). After the wearer uses their Skill on one ally character, increases the Skill DMG dealt by the target by 54.0~108% for 3 turn(s).This is Cerydra’s signature Light Cone and her overall best option.
SourceLight Cone Event Warps
Departing Anew
After the wearer uses Skill or Ultimate on one ally character, the wearer regenerates 6.0~8.0 Energy and the ability's target receives 1 stack of "Hymn" for 3 turn(s), stacking up to 3 time(s). Each stack of "Hymn" increases its holder's DMG dealt by 15~24%. After every 2 instance(s) of Skill or Ultimate the wearer uses on one ally character, recovers 1 Skill Point.This is a good alternative Light Cone, though it falls short compared to her signature option.
So good!
Increases the wearer's ATK by 16~32%. After the wearer uses Skill, increases ATK by 8~16%, stacking up to 3 times.This is her best 4★ Light Cone, designed to boost her ATK.
SourceStellar Warp, Departure Warp, Character Event Warp, Light Cone Event Warp
Cannot Stop It!
When the wearer uses their Ultimate, all allies' actions are Advanced Forward by 16~24%.Although it doesn’t provide strong stat boosts, this Light Cone is still a great alternative for stealing turns, especially against enemies.
Secret
At the start of the battle and whenever the wearer's turn begins, one of the following effects is applied randomly: All allies' ATK increases by 10~20%, all allies' CRIT DMG increases by 12~24%, or all allies' Energy Regeneration Rate increases by 6~12%. The applied effect cannot be identical to the last effect applied, and will replace the previous effect. The applied effect will be removed when the wearer has been knocked down. Effects of the same type cannot be stacked.
This is also a good alternative Light Cone; however, its buffs are determined at the start of battle and last until the end of combat.
SourceStellar Warp, Departure Warp, Character Event Warp, Light Cone Event Warp
Fleet Triumph
After the wearer uses attacks or gets hit, additionally regenerates 4~8 Energy. This effect cannot be repeatedly triggered in a single turn. This is her best 3★ Light Cone, offering excellent support for Ultimate uptime.