Duke

Duke is a nickname given to Doom-shroom by Maya and also a major character in Plants vs Zombies

Grasswalk Arc
He was once a plant until he is sold to Maya and was sprayed by a 'bug spray' which turned him into a human.

Personality and Traits
Even as a human, he still has his traits as he was a Doom-shroom. He is really ill-tempered and can occasionally start an argument when one does wrong. Emily also mentioned that he can be bossy to the point that he is the most disliked plant in the neighborhood. He also seldom smiles and he only smiles when he feels relieved. Despite all this negative traits, he is somewhat caring like he told Maya to stay away from Chomper during his 'no-feed day'.

Links

 * Doom-shroom in Plants vs Zombies wiki