Bob

Bob the Anime Cardboard
Bob the Anime Cardboard is the title character on "Bob the Anime Cardboard and Friends". He was first introduced in "Episode One", when he moves to the Cardboard Islands. Bob is friends with Lenny and Nolan. He is also the son of Andy and Bob's mom. In "Lion Island Part One", he finds Andy on Lion Island. Bob has giant "anime" eyes and is made of cardboard. He is one of the largest characters on the show, being tied with Andy. Co-Creator Keith Johnson says that Bob gets his size from Andy and his "cardboardness" from his mom.

Official Backstory
Not much is known about Bob's backstory. What is known is that he was very sad when his father Andy got trapped on Lion Island. Bob lived with his mother off of the coast of the Cardboard Islands, until he moved to the Islands in the first episode.