Who is the female teacher who explodes her head in Harry Potter 3?

Full name: sibyll trelawney.

Occupation: Hogwarts divination teacher

Descent: unknown

Actor: emma thompson

First mention: Harry Potter And The Prisoner Of Azkaban.

Debut: Harry Potter And The Prisoner Of Azkaban

Features: She has made real predictions for Harry Potter and Voldemort (in this state, her voice is hoarse and low), but she is crazy most of the time and likes to predict people's death.

Her admirers: Lavender Brown, Parvati Patil.

Annoying people: Firenze Centauri (Firenze took his place after Umbridge fired him, but failed to get rid of him after recovery) and dolores umbridge.

Deeds: Made many true predictions.