HERO GUIDE

Castia

SSR

Strategist Lucia · Hero Guide　·　2026.09.23　·　Mage / Cavalry / Magic

Intro

Castia, who moves through the shadows to eliminate threats to Lady Saint, is the cold yet devout captain of the Holy Blades. Behind her unimpeachable loyalty lies a small secret—one even Lady Saint doesn't know. Join Lucia now to learn more about this Hero~

Fanaticism, unshakable faith, and an iron will—these are the minimum requirements to enter the Holy Blades, Lady Saint's personal assassination unit. As captain of the Holy Blades, Castia is an exemplary figure in every regard. Not only is she devout and her skill as a killer unmatched—her loyalty to Lady Saint borders on obsession. Over her years of service, she has lurked in the shadows, eliminating countless villains who dared to lay a hand on Lady Saint, snuffing out every potential threat before it could even take root. Yet this cold, ruthless killer harbors a small secret in her heart—one that even Lady Saint herself does not know. "Anyone who approaches Lady Alfina without permission will be eliminated on sight."

Skill Breakdown

Effects are objective game data

Core 1

Silent Heartpierce

[Active Skill] Every 1 turn(s), there is a(n) 50% chance to increase own Magic DMG dealt (basic attack only) by 61.04% for 5 turn(s), up to 5 stack(s), and increase Magic DMG dealt (basic attacks only) for 1 of own Hero and troop (prioritizing Brigade 1) by 61.04% for 5 turn(s), up to 5 stack(s).

Lv.4The skill effect receives a slight bonus based on own ATK, and the activation chance receives a slight bonus based on own COM.Lv.7The skill effect receives an extra bonus based on own ATK, and the activation chance receives an extra bonus based on own COM.

Lucia：This skill strengthens Castia's own Magic basic attacks while also supporting the Brigade 1 Hero and troop, letting her boost her own power and back up her allies at the same time. Paired with Heroes who rely on Magic basic attacks, this skill can amplify the damage of every basic attack from the team.

Core 2

Stealth Lock-on

[Initiating Skill] At the beginning, grant own brigade's troop 10 stack(s) of: Reduce DMG taken by 1.96%, reducing by 1 stack per turn. [Active Skill] Every 1 turn(s), there is a(n) 50% chance to increase DMG taken from basic attacks for 2 enemy troops by 9.17% for 3 turn(s), up to 3 stack(s).

Lv.4The skill effect and activation chance receive a slight bonus based on own ATK and COM.Lv.7The skill effect and activation chance receive an extra bonus based on own ATK and COM.

Lucia：This skill shields her own troop right at the start of battle while also making enemy troops more vulnerable to basic attacks. Combined with the boost from Silent Heartpierce, she can increase your team's damage output and the enemy's damage taken at the same time.

Core 3

Garrote Sentence

[Active Skill] Every 1 turn(s), there is a(n) 50% chance to increase own Magic DMG dealt (basic attacks only) by 100.17% for 3 turn(s), up to 3 stack(s). [Active Skill] On turns 4 and 5, grant self Combo: There is a(n) 100% chance to launch an extra basic attack when attacking for 1 turn(s).

Lucia：This skill further strengthens Castia's Magic basic attacks and adds extra attacks through Combo. Once paired with the advantages given by Silent Heartpierce and Stealth Lock-on, her basic attacks can become the key to breaking through the enemy's defense.

Exclusive Weapon

Purging Silk

Stats

Exclusive Weapon	Not Evolved	Max.
Hero BRV	+40%	+80%
ATK	+11	+21
COM	+5	+9

To move through the shadows and kill without a trace—this is the operating creed of the Holy Blades. To purge all the scum that could threaten Lady Saint, Castia has wielded this weapon since the day she joined the Holy Blades. The weapon is steel, tempered by arcane arts into filaments too fine to see yet unbreakably strong, their ends fastened to rings. When she wears them, a single curl of her finger sends the wire slicing silently through the air—drawing tight, severing vital points before the target can ever take notice. To Castia, these assassinations are not mere killing—they are sacred acts of judgment and execution, and those who dare covet Lady Saint deserve nothing more than to become cold corpses, condemned to an eternal hell.

Not Evolved

EX Weapon Core 1

EX Weapon Effect

[Active Skill] Every 1 turn(s), there is a(n) 65% chance to increase own DMG dealt by 2.71% for 3 turn(s), up to 3 stack(s). [Follow-up Skill] When own basic attack target's HP% is lower than 50%, after a basic attack, deal Magic DMG 24.75% of own BRV to it.

Max.

EX Weapon Core 1

EX Weapon Effect

[Active Skill] Every 1 turn(s), there is a(n) 65% chance to increase own DMG dealt by 16.26% for 3 turn(s), up to 3 stack(s). [Follow-up Skill] When own basic attack target's HP% is lower than 50%, after a basic attack, deal Magic DMG 148.5% of own BRV to it.

Lucia：The EX Weapon boosts Castia's damage output and adds bonus Magic DMG after a basic attack lands on a weakened target. Combined with the basic attacks enhanced by her Talents, it makes her an even bigger threat up against low-HP enemies, making it harder for opponents to catch a break under her offense.

Recommended Team

Lucia's take

Castia

SSR

Mage・The Holy Church

Oni Komichi

SSR

Warrior・Izumono-kuni

Tranquil Dawn Raphael

SSR

Tactician・The Holy Church

Upgrade Priority

1Stealth Lock-on

2Silent Heartpierce

3Garrote Sentence (1TP)

Castia　Stealth Lock-on > Silent Heartpierce With these skills, she can first protect her own troop and increase the basic attack damage taken by enemy troops, then stack the Magic basic attack buff onto herself, building toward increasingly powerful basic attacks.

Oni Komichi　Oni Bloodline > Thrashing Strikes Concentrate on boosting her own basic attacks and active skill damage. Combined with her EX Weapon's ignore PDEF effect, she can tear through the enemies alongside Castia.

Tranquil Dawn Raphael　Hidden Talent > Sweet Scent While using her status effect skills to cover her teammates early on, her unique skill to increase the enemy's basic attack DMG taken pairs really well with the other two Heroes. As long as they hold steady in the early game, her support allows the whole team to unleash relentless attacks.

Alternative Comps

Alternatively, try the team compositions below: Alfina + Castia + Catherine This composition has Castia main Silent Heartpierce, boosting both Alfina in Brigade 1 and herself, while Alfina mains Braver's Pact to strengthen Castia, who has the highest ATK. An all-Holy Church lineup also lets Alfina perform at her best while Catherine rounds out the team with healing and Bless to cover the team's all-out assault.

Lucia's Summary

Moving through the shadows to eliminate every threat to Lady Saint, Castia is the captain of an assassination unit who turns devout faith into a lethal offense. She strengthens her own and her allies' Magic basic attacks, then piles on pressure against weakened targets with Combo and her EX Weapon's follow-up strikes, showing off a cold, efficient finishing touch. Make sure to pair her with allies who can help hold the line early on or teammates who can capitalize on her basic attacks specialty, letting the captain of the Holy Blades build up her offense and pass judgment on her enemies with an unrelenting barrage of basic attacks!

—— Strategist Lucia · Hero Guide

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This Character

CastiaSSR · Mage

521.7

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