Catherine MR Guide: Official Kit, Build and Lineups — Echocalypse: Scarlet Covenant

Catherine at a Glance

Profile: Earth MR, Augustine Empire, Ball Blessing. Primary role: Max HP-scaling healing, overheal shields, Element Block and damage mitigation. All numerical values come from the official English promotional sheet from Echocalypse SEA; the star level represented is not specified. Birthday: November 6. Height: 171 cm. Hobbies: Ball. Personality: elegant, mysterious, and deeply calculating.

Official Kit

Normal — Dance of Delight: 217% ATK Earth Magic DMG to the default column; permanently grants front-row allies +15% Healing Received up to 3 stacks; restores 25 Pneuma.

Active — Ball March: 441% ATK Earth Magic DMG to the default column; heals the three lowest-HP allies by Ball Fervor × 5% of Catherine's Max HP; excess healing converts into Shield; applies Social Hour (front row) and Ball Guest (back row) for 2 rounds; restores 50 Pneuma. Social Hour reduces self damage taken by 4% per Ball Fervor stack and grants +30% permanent Element Block Strength when it ends. Ball Guest details are not described in the poster.

Passive — Elegant Socialite: Starts with 14 Ball Fervor (max 20). At the end of every round, heals the three lowest-HP allies by Ball Fervor × 5% Max HP; excess turns into Shield. Permanently grants Earth allies +10% Final DMG Reduction, up to 4 stacks. With no ally deaths, all allies gain +50% Element Block and +50% Element Block Strength; each allied death reduces the bonuses by 5 percentage points and grants Catherine 2 Ball Fervor. Each Ball Fervor grants Catherine +5% Healing and +3% Element Block; she gains 2 stacks after acting.

Critical — Everlasting Ball: 720% ATK Earth Magic DMG to the default column. Heals the front row by Ball Fervor × 5% Catherine Max HP (+30% healing for Earth targets), excess converted to Shield. Applies Endless Ball to Catherine and Never Ends to the front row for 3 rounds. Endless Ball: after triggering Block, heals the three lowest-HP allies by Ball Fervor × 4% Max HP and permanently reduces all enemies' ATK and Final DMG by 10%, up to 5 stacks, up to 2 triggers per round. Never Ends: after taking Active DMG, converts 20% into healing (capped at 400% average team ATK), up to 3 triggers per round; on overhealing, deals True DMG equal to 50% of the excess healing to the default enemy, up to 3 triggers per round.

Build Priorities

1. Max HP first — her core heal formulas scale with Catherine's Max HP.
2. Survivability second — keeps Catherine alive for end-round sustain and preserves the no-death team buff.
3. Healing / Block utility — useful where available and verified.
4. ATK / Critical lower — offensive skills scale with ATK, but her key support effects scale with HP.

No official source validates best-in-slot gear or exclusive weapon effects for Catherine yet, so this guide does not present speculative item names as a final build.

Recommended Lineups

• Mono-Earth Counter — Front: Zoya, Rorza, Juliette; Back: Crimsonfall Caroline, Rafaela, Catherine.
• Mono-Earth Sustained DPS — Front: Zoya, Rorza, Mirage; Back: Honorblade Chiraha, Rafaela, Catherine.
• Mixed Earth/Thunder — Front: Zoya, Rorza, Alice; Back: Jolie, Rafaela, Catherine.
• Mixed Water/Earth — Front: Lyora, Zoya, Rorza; Back: Clara, Rafaela, Catherine.
• Earth Budget/Flexible — Front: Rorza, Juliette, Shu; Back: Rafaela, Catherine, Flex DPS.

Verdict

A powerful defensive utility Case for Earth-centered teams, especially around Rafaela; not a universal replacement for offensive carries. The official SEA poster does not specify star breakpoints, so no effect in this guide is claimed to unlock at 0, 3, or 7 stars.