Aoi Kaguragi vs Akamai: who would win?

Aoi Kaguragi favored — Slight edge (~55%)

Aoi Kaguragi · Kaiju No. 8 · Post-Second Division Training

Tier
7-A
Attack Potency
Mountain Level+
Speed
Unknown
Durability
Mountain Level+

Akamai · Bionicle · Mata

Tier
7-A, up to HIGH 5-A
Attack Potency
Mountain Level, up to Brown Dwarf Level
Speed
Massively Hypersonic+, up to Relativistic
Durability
Mountain Level

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