Shoto Todoroki vs Keeper of the Old Lords: who would win?

Keeper of the Old Lords favored — Slight edge (~55%)

Shoto Todoroki · My Hero Academia · U.A. Beginnings Saga

Tier

8-A, up to HIGH 7-C

Attack Potency

Multi-City Block Level, up to Large Town Level

Speed

Athletic Human, up to Hypersonic

Durability

Multi-City Block Level+

Keeper of the Old Lords · Bloodborne · Base

Tier

8-A

Attack Potency

Multi-City Block Level

Speed

High Hypersonic

Durability

Multi-City Block Level

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