Kamen Rider Mach vs Kiran (Fire Emblem): who would win?

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

Kamen Rider Mach · Kamen Rider · Dead Heat Mach

Tier

1-C

Attack Potency

Complex Multiverse Level

Speed

Ftl

Durability

Wall Level

Kiran (Fire Emblem) · Fire Emblem · Book I

Tier

1-C

Attack Potency

Complex Multiverse Level

Speed

Superhuman, up to Massively Hypersonic+

Durability

Unknown

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