Starderd is actually an ai inside an endo skeleton who grabbed any kind of suit he found and ended up looking like this...

He was planned to be apart of the jena's family diner, but many coworkers got confused with the name, some of tham thought it was a girl and some thought it was a boy, making them make completely random parts of the suit mike decided to keep them and not put it on it, but the endo decided to do so, Daisy (before she dies) saw him being active, which why he will be in fnatas 5, he will be (of course) boss fight which he wants to play with her before he gets ease from daisy's memory (this endo is completely abandoned and was waiting and also excited to be apart, but him ending up being abandoned made him suffering from loneliness and craziness and also sadness, and for any kind of guy with cancer, he want to atleast see a child and see him face to face, no matter if it makes them afraid or sad or excited, he just want to be known... Even if it was one kid

After his system shut down,jaiden grabbed some of his parts and recreated them with mike