Sam Sweetmilk

Sam Sweetmilk is a main character and captain of the Starship Goldfish. His self-induced retrograde amnesia has reverted him back to a childlike state, and he requires help from his robot father, Ghostworth, to develop his personality and values again. He is voiced by the show's creator, Jason Weight.

Personality
Before the events of the series, Sam deleted all of his memories due to severe trauma that has yet to be revealed. This has resulted in him becoming what is comparable to a child in an adult's body, as he remembers nothing from his life before a year ago. He has very poor spelling abilities, is generally ignorant, and has a short attention span. Sam is also often extremely selfish and puts others in danger out of apathy or to protect himself. Despite this, he does have a few compassionate moments, where it's revealed that he really does care about his friends.

Trivia

 * Originally, Sam was supposed to be the main character of the show, with it even being named after him. This was changed however, after the first two episodes in order to make it more unique.
 * Jason Weight is now the official voice actor for Sam, but at first he was only supposed to be a place holder.
 * Sam's last name, Sweetmilk, is a joke about jizz.