Millennian Io vs Eria the Water Charmer: who would win?

Millennian Io favored — Slight edge (~55%)

Millennian Io · Godzilla · Unstable State/Orga

Tier

8-A

Attack Potency

Multi-City Block Level

Speed

Subsonic, up to Supersonic+

Durability

Multi-City Block Level

Eria the Water Charmer · Yu-Gi-Oh! · Raging Eria

Tier

8-A

Attack Potency

Multi-City Block Level

Speed

Supersonic

Durability

Wall Level, up to Small Building Level

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