Eishlen
Eishlen is a 5★ Vanguard-class Partner in Chaos Zero Nightmare. Equipped on a Combatant, Eishlen raises DEF by +12–20% (Always active) and Max HP by +12–20% (Always active). Eishlen's EGO skill, Innos's Guardian, can be used for 4 cost. Rewritten in plain terms from in-game data — not a copy of the original wording.
Partner Passive
Arcane Wave
What this partner does when equipped, explained buff-by-buff (values shown as a low→high investment range).
| Buff | Amount | Condition |
|---|---|---|
| DEF | +12–20% | Always active |
| Max HP | +12–20% | Always active |
| Shield gained | +12–20% | Always active |
| DEF-based DMG | +15–30% | while in Counterattack state |
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 |
|---|---|---|---|---|---|
| DEF · Main stat boost | +12% | +14% | +16% | +18% | +20% |
| Max HP · Main stat boost | +12% | +14% | +16% | +18% | +20% |
| Max HP | +8% | +10% | +12% | +14% | +16% |
| Counterattack DMG | +15% | +19% | +23% | +27% | +30% |
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.
100% shield. At the end of the turn, retain 50% of Shield.
Is Eishlen Worth Investing In?
Eishlen is a 5★ partner whose passive raises DEF by +12–20% across 5 official investment tiers — a solid pick whenever your team needs that stat.
Which Combatants Does Eishlen Work Best With?
Eishlen is a Vanguard-class partner. Its main effect grants a DEF bonus, so it fits any Combatant whose damage or survivability scales with DEF, not just one fixed unit.
What Does Eishlen's EGO Skill Do?
Eishlen's EGO skill, Innos's Guardian, costs 4 and does the following: 100% shield. At the end of the turn, retain 50% of Shield.
