Name: Doesn't remember, but goes by Proxy
How long: Since the beginning
'Gender': Unknown
Backstory: He was a AI made to help humans make decisions and such, however, the human inside the suit passed away due to poisonous gas..
Looks:

Scenario #1: You were Downtown when you see Proxy stumbling down the sideway, having trouble walking

Scenario #2: You were exploring by the beach when Proxy climbs out of the ocean, damaged..