Hirofumi Yoshida vs Nightmare (Dungeons and Dragons): who would win?

Nightmare (Dungeons and Dragons) favored — Slight edge (~55%)

Hirofumi Yoshida · Chainsaw Man · Base

Tier

HIGH 8-C, up to 8-A

Attack Potency

Large Building Level, up to Multi-City Block Level

Speed

High Hypersonic

Durability

Large Building Level

Nightmare (Dungeons and Dragons) · Dungeons & Dragons · Cauchemar Nightmare

Tier

HIGH 8-C, up to 8-A

Attack Potency

Large Building Level, up to Multi-City Block Level

Speed

Relativistic+, up to Ftl+

Durability

Large Building Level, up to Multi-City Block Level

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