Marth (Fire Emblem Heroes) vs Artemis (Fate): who would win?

Marth (Fire Emblem Heroes) favored — Slight edge (~55%)

Marth (Fire Emblem Heroes) · Fire Emblem · Book I

Tier

1-C

Attack Potency

Complex Multiverse Level

Speed

Superhuman, up to Massively Hypersonic+

Durability

Complex Multiverse Level

Artemis (Fate) · Nasuverse · True Form

Tier

1-C

Attack Potency

Complex Multiverse Level

Speed

Immobile, up to Immeasurable

Durability

Complex Multiverse Level

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