Ran Haitani vs Melisandre: who would win?

Ran Haitani favored — Slight edge (~55%)

Ran Haitani · Tokyo Revengers · Base

Tier
9-B
Attack Potency
Wall Level
Speed
Hypersonic
Durability
Wall Level

Melisandre · Game of Thrones · Base

Tier
9-B, up to 9-A
Attack Potency
Wall Level+, up to Small Building Level
Speed
Below Average Human, up to Average Human
Durability
Below Average Human Level, up to Human Level

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