|Voiced by Sheryl Lee Ralph|
|Real Name||May James|
|Alias||Jason's Gran, Mother Goose|
|Super Power||None; Wields an ax, and is tough for her age|
Jason's Grandma - who is usually called "Grams" - is the sweet but tough ex-Marine Corps. Drill Sergeant, who is raising Jason James after the death of his parents. At first, Jason did not tell her that he was Z-Strap, but she knew and she later approached him with this knowledge. It is also revealed that she's keeping more secrets about Jason's parents and Operation Z than she is letting on.