The Lich King Cometh
The necromancer Vestra's skeletal minion
This walking skeleton is the necromancer Vestra’s skeletal minion. When not battling by her side, the skeleton is traveling just underground, causing a disturbance in the top soil as he moves.
After a battle is over in which the skeleton is destroyed, Vestra seems to take enjoyment in putting his pieces back together herself before calling back his spirit.
While Vestra doesn’t talk about her “Skelly,” it is obvious that this skeleton is someone that she used to know.