Zess T. is a grumpy, fifty-five year old Toad who appears in Paper Mario: The Thousand-Year Door, residing as a chef in Rogueport. She is a Yellow Toad and her name and last initial are a pun on the verb "zesty", which, in a way, describes her personality as well as referencing her cooking skills. Like Tayce T. (Zess T.'s possible sister), she is an expert at cooking, but has a sour expression and is normally mean and grumpy. If given certain items, she can cook dishes for Mario. Interestingly, of her dishes is served as a breakfast at an expensive hotel.
Zess T. is a Yellow Toad with an unpleasant expression. She also wears brown shoes, a black shirt, and a red apron.
In Paper Mario: The Thousand-Year Door, Mario first comes across Zess T. while she is searching for her Contact Lens, when Mario accidentally steps on the Contact Lens and crushes it. Zess T. then refuses to allow him into Rogueport's West Side until he buys her a new one. Mario orders a replacement for her at the Toad Bros. Bazaar and after Chapter 1, he can buy them for 10 coins. Even after Mario gives Zess T. the contact lens, she still harasses a bit of grudge, calling Mario nicknames like "Stompy" or "Sir Stomps-on-Stuff".
Zess T. can only cook one item at a time until Mario finds Maitre Delish's cookbook hidden in a back room of the Creepy Stable. After that, she is able to cook two items into one dish for the remainder of the game.