Ms. Grunkle

Ms. Grunkle is the villainess of JumpStart Adventures 4th Grade: Haunted Island. She is a fourth-grade substitute teacher and a witch, who turned the kids into monsters and brought them to the Haunted Island, which she apparently rules over.

Appearance
Ms. Grunkle has gray skin, straight white/gray hair, yellow eyes, and red lips. She wears a black pointed hat, a black dress with skull-shaped buttons down the front, red and white striped stockings, and black shoes.

JumpStart Adventures 4th Grade: Haunted Island (1996)
Ms. Grunkle appears at the beginning and ending of the game. Sometimes after the player completes an activity she flies by on her broomstick to taunt the user, with comments such as, "So, you think you're pretty good at my little games? Well, you haven't seen anything yet!" before flying off. When the player unlocks a new room in Ms. Grunkle's house, she will confront them and send them to the labyrinth.

Trivia

 * Curiously, she is sometimes referred to as "Mrs. Grunkle," prompting one to wonder whatever became of her husband.
 * She has a skeleton in her living room watching TV & holding a remote, which fans have speculated could have been her husband at one point.