Rosaria
Rosaria is a 4★ Ranger-class Partner in Chaos Zero Nightmare. Equipped on a Combatant, Rosaria raises ATK by +8–16% (Always active) and Extra Attack DMG by +10–20% (Always active). Rosaria's EGO skill, Security Team, Requesting Support!, can be used for 2 cost. Rewritten in plain terms from in-game data — not a copy of the original wording.
Partner Passive
Financial Support
What this partner does when equipped, explained buff-by-buff (values shown as a low→high investment range).
| Buff | Amount | Condition |
|---|---|---|
| ATK | +8–16% | Always active |
| Extra Attack DMG | +10–20% | Always active |
| Morale gain chance | +25–50% | when you use a Skill/Upgrade card · for 1 turn |
Rewritten in plain terms from in-game data — not a copy of the original wording.
Level-by-level upgrade table
Official in-game data across all 5 investment tiers (not just the low–high range).
| Buff | Tier 1 | Tier 2 | Tier 3 | Tier 4 | Tier 5 |
|---|---|---|---|---|---|
| ATK · Main stat boost | +8% | +10% | +12% | +14% | +16% |
| Extra Attack DMG | +10% | +13% | +15% | +18% | +20% |
| Morale gain chance | +25% | +32% | +38% | +44% | +50% |
Rewritten in plain terms from in-game data — not a copy of the original wording.
EGO Skill
A special skill this partner can activate by paying the cost below.
Draw 1 Enhanced Card(s). If there are no Enhance Cards in the Draw Pile, Draw 1 Card.
Is Rosaria Worth Investing In?
Rosaria is a 4★ partner whose passive raises ATK by +8–16% across 5 official investment tiers — a solid pick whenever your team needs that stat.
Which Combatants Does Rosaria Work Best With?
Rosaria is a Ranger-class partner. Its main effect grants a ATK bonus, so it fits any Combatant whose damage or survivability scales with ATK, not just one fixed unit.
What Does Rosaria's EGO Skill Do?
Rosaria's EGO skill, Security Team, Requesting Support!, costs 2 and does the following: Draw 1 Enhanced Card(s). If there are no Enhance Cards in the Draw Pile, Draw 1 Card.
