Kiyama Harumi vs Owen Grady: who would win?

Owen Grady favored — Slight edge (~55%)

Kiyama Harumi · Toaru Majutsu no Index · Base

Tier

9-C, up to 8-B

Attack Potency

Street Level, up to City Block Level

Speed

Average Human

Durability

Human Level, up to Town Level

Owen Grady · Jurassic Park · Base

Tier

9-C

Attack Potency

Street Level

Speed

Superhuman

Durability

Street Level

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