Kafka Hibino vs The Satellite Square: Etherion: who would win?

The Satellite Square: Etherion favored — Slight edge (~55%)

Kafka Hibino · Kaiju No. 8 · Full Transformation (Post-Bond)

Tier
6-A, up to HIGH 6-A
Attack Potency
Continent Level, up to Multi-Continent Level
Speed
Ftl
Durability
Continent Level, up to Multi-Continent Level

The Satellite Square: Etherion · Fairy Tail · Base

Tier
HIGH 6-A
Attack Potency
Multi-Continent Level
Speed
Unknown
Durability
Unknown

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