A mix of a jokester whose gags always fall flat but who has high energy. Obviously a vegetable, just look at the image.

A cheerful jokester with a surprisingly human touch. Has no face, but it's a face.

A jokester, though maybe just an idiot straight-man. Has arms and legs, but it's a vegetable.

A junior who is always plagued by bad luck, but is the only sane person and straight-man. Has holes that it claims are its face.