Alfonse vs Fog Mother: who would win?

Fog Mother favored — Slight edge (~55%)

Alfonse · Fire Emblem · Book I

Tier

1-C

Attack Potency

Complex Multiverse Level

Speed

Superhuman, up to Massively Hypersonic+

Durability

Complex Multiverse Level

Fog Mother · Kamen Rider · Mothership

Tier

1-C

Attack Potency

Complex Multiverse Level

Speed

Ftl, up to Ftl+

Durability

Complex Multiverse Level

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