Oliver Fog
Who is Oliver Fog?
Oliver Fog is a 4-star Star-afflatus defensive buffer who protects his team by granting [Sturdiness], DEF, and Mental DEF buffs through his mass buff skill. His Insight passive gives him a self-regenerating shield that reduces the damage he personally takes, and he has a leech rate built into one of his skills to keep himself alive. He drains HP at round end as part of his insight mechanic, making self-sustainability a balancing act. Defensive buffers have fallen out of favour as premium sustain options have become stronger, and Oliver Fog is rated low on tier lists as a result, but he remains a functional filler for players lacking better options.
Kit Summary
Single-target attack with a built-in leech rate — heals Oliver Fog based on damage dealt, offsetting his HP drain mechanic.
Mass buff — gives all allies [Sturdiness] stacks and increases all allies' Reality DEF and Mental DEF by up to 20% for 2 rounds.
Oliver Fog gains a personal shield that reduces his own DMG Taken by 20% at round end; the passive also costs him HP each round, requiring the leech on Skill 1 to stay healthy.
Build Guide
🔮 Best Relic / Echo Set
Resonance: ATK% to support his leech rate on Skill 1 and keep him alive. HP% as a secondary to offset his per-round HP drain passive.
⚔ Best Light Cone / Weapon
Remaining Absurdity (signature anecdote, prydwen): Grants 10–20% Incantation Might on attacks while Oliver has a shield — which is always. The Reality DEF substat is not ideal but the Incantation Might is a solid bonus. His Bounden Duty (budget): Meaningful base ATK increase that directly compensates for his chronically low 4-star stat line.
📊 Substats Priority
👥 Best Teams
Defensive buffer slot: Oliver Fog + DPS carry + offensive support + healer — positioned to provide [Sturdiness] and DEF buffs in early-game content where enemies do not hit hard enough to one-shot through his shields.
F2P Verdict
Oliver Fog is available on the standard banner. His anecdote psychube Remaining Absurdity is obtainable through the anecdote system. No limited or event pulls required.
Frequently Asked Questions
Why is Oliver Fog rated so low on tier lists?
Defensive buffers as a class are poorly valued in the current meta because premium healers and supports provide far more impactful team support. Oliver Fog provides modest DEF buffs and [Sturdiness] but no offensive utility, making him a below-average choice compared to almost any 5★ or 6★ support.
How does his HP drain mechanic work?
His Insight I passive drains a small amount of HP at the end of each round. His Skill 1 Working Hours has a built-in leech rate that heals him proportionally to damage dealt — using Skill 1 each round is essential for keeping him alive across a long fight.
Does [Sturdiness] from multiple sources stack?
[Sturdiness] stacks are additive — if Oliver Fog and another character both apply [Sturdiness], allies absorb multiple incoming hits before losing the buff. However, each stack only absorbs one damage instance.