Shadow the Hedgehog (CAV-4)

Shadow the Hedgehog, the more successful result of Project: Shadow, is assumed by first glance to be closed-off, emotionless save for anger and contempt, and wanting nothing to do with anyone around them.

In truth, they're socially awkward and their expression is a glare by default. They don't quite understand the nuances of social interaction, are all-around bad at expressing themselves, and in their defense they're a half-alien space cyborg that was in cryostasis for 50 years.

Sonic affectionately calls them "Faker", while Chris refers to them as "Terios". Sonic shortens that to "Terry".

They have a few knock-off androids around, but make no mistake, this is the real Ultimate Lifeform! ...not counting the ones from other universes they eventually bump into. Now that's just surreal.