Marian Slingeneyer vs Nanomech: who would win?

Marian Slingeneyer favored — Slight edge (~55%)

Marian Slingeneyer · Toaru Majutsu no Index · Base

Tier

9-C, up to HIGH 1-C

Attack Potency

Street Level, up to High Complex Multiverse Level

Speed

Average Human, up to Supersonic

Durability

Street Level

Nanomech · Ben 10 · Base

Tier

9-C

Attack Potency

Street Level

Speed

Average Human

Durability

Below Average Human Level

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