Christopher Pike vs Marian Slingeneyer: who would win?

Marian Slingeneyer favored — Slight edge (~55%)

Christopher Pike · Star Trek · Normal

Tier

10-A, up to 8-C

Attack Potency

Below Average Human Level, up to Building Level

Speed

Athletic Human, up to Speed Of Light

Durability

Athlete Level

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

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