Three characters are killed, two of them die on screen and the other one is killed off screen, but his dead (not graphical) body is seen.
No violence.
Moderate. Some of the violence in this movie is kind of disturbing.
Harry finds a dead body in a forest, we only briefly see this and is not gory or explicit.
Moody tortures and then kills a spider with spells during a class. Neville is distressed by the torturing.
Harry is chased by a giant dragon in an action sequence, which breathes fire at him and knocks him off his broomstick several times. He isn't hurt, but is seen with a few cuts, bruises and bandages after.
A young man is cursed, and tries to attack other teenagers with spells. They fight back, and the young man is knocked out.