Kamen Rider Century vs Itsuki Aoi: who would win?

Kamen Rider Century favored — Slight edge (~55%)

Kamen Rider Century · Kamen Rider · Kamen Rider Century Break

Tier

2-C

Attack Potency

Low Multiverse Level

Speed

Ftl

Durability

Low Multiverse Level

Itsuki Aoi · Megami Tensei · Endgame Carnage Form

Tier

2-C, up to LOW 1-C

Attack Potency

Low Multiverse Level, up to Low Complex Multiverse Level

Speed

Massively Hypersonic+, up to Immeasurable

Durability

Low Multiverse Level, up to Low Complex Multiverse Level

A heuristic estimate from normalized VS Battles Wiki stats: tier, attack potency, speed and durability.