Saiko Yonebayashi vs Ruby (Crystal Gems): who would win?

Ruby (Crystal Gems) favored — Slight edge (~55%)

Saiko Yonebayashi · Tokyo Ghoul · Base

Tier

8-A, up to LOW 7-C

Attack Potency

Multi-City Block Level, up to Small Town Level

Speed

Massively Hypersonic, up to Massively Hypersonic+

Durability

Multi-City Block Level, up to Small Town Level

Ruby (Crystal Gems) · Steven Universe · Base

Tier

8-A

Attack Potency

Multi-City Block Level

Speed

Relativistic

Durability

Multi-City Block Level

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