White Walker (The Door)

A White Walker is a character in the sixth season. He is one of the White Walkers accompanying the Night King during his ambush at the Cave of the three-eyed raven.

After killing a Child of the Forest, the White Walker is stabbed by Meera Reed with what seems to be a dragonglass spear, causing him to collapse in broken ice.

Season 6
During an attack at the Cave of the three-eyed raven lead by the Night King, the White Walker steps inside and is attacked by a Child of the Forest with a spear, but the spear does little to no damage and the Child is quickly killed by the Walker. After doing so, Meera attacks the Walker with what seems to be a spear made out of dragonglass, causing him to break into ice almost immediately.