Ritsu Kageyama vs Ant-type Kaiju: who would win?

Too close to call

Ritsu Kageyama · Mob Psycho 100 · 100%

Tier: 7-C
Attack Potency: Town Level+
Speed: Subsonic+, up to Massively Hypersonic
Durability: Town Level+

Ant-type Kaiju · Kaiju No. 8 · Base

Tier: 7-C
Attack Potency: Town Level+
Speed: Subsonic
Durability: Town Level+

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