Lucia

Lucia's signature and a Lucia-only engine in practice: its full effect needs Ether Veil. Huge HP and Energy Regen keep her buffs at max uptime, and every squad member gains DMG and Max HP whenever Ether Veil activates — which is effectively always.

Off-field Energy Regen plus a short DMG bonus on targets the wearer hits. Lucia's frequent inactive attacks refresh it often, and brief on-field stints during Stun windows push uptime even higher. A strong pick.

The best generalist A-Rank Support engine, feeding the whole team ATK%. Rupture agents scale mostly off HP rather than ATK, so it works in Lucia teams but rarely tops the list.

Niche but potent: when the boss is weak to Ether, its party-wide CRIT Rate passive turns it into a near-signature-level option. Without that weakness it falls well behind.