Tidal Wave (Dreamwave Unicron Trilogy) vs Vivian (Nanatsu no Taizai): who would win?

Vivian (Nanatsu no Taizai) favored — Slight edge (~55%)

Tidal Wave (Dreamwave Unicron Trilogy) · Transformers · Mirage

Tier

HIGH 7-A

Attack Potency

Large Mountain Level

Speed

Superhuman, up to Massively Hypersonic+

Durability

Large Mountain Level

Vivian (Nanatsu no Taizai) · Nanatsu no Taizai · Base

Tier

HIGH 7-A

Attack Potency

Large Mountain Level

Speed

Sub-Relativistic

Durability

Unknown

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