Caucasian Bob has blond hair and eyebrows, blue eyes, a blue-and-white-striped shirt, a brown vest with two buttons, a belt, a pair brown pants, and a pair of black shoes.
Dark-skinned Bob has black hair and eyebrows, gray eyes, a black jacket with six buttons, a pair of blue pants, and a pair of black shoes.
Bob is a happy person and cheers Jesse when he/she uses the slime-diving platform of their choice (determinant).
Bob seems like a fan of Jesse, as he is excited for Jesse to use his slime-diving platform and cheers Jesse on for using it (determinant).
- "Hero in Residence"
- "Giant Consequences" (Background)
- It was confirmed by Eric Stirpe that Bob's appearance is randomized--sometimes having a Caucasian skin-tone with blond hair, and another version with a brown skin-tone and black hair. 
- There is another character in "Access Denied" with the same name: "Bob."
- Bob and Reuben (Pig) are the the only characters to have the same name as another character. (Reuben (Human) and Bob from "Access Denied")