Asgore Dreemurr

Asgore Dreemurr was the king and ruler of the Underground near Mount Ebott. He was on a quest to gather seven human souls which he could use to break the barrier between the worlds of the monsters and humans so he could gather revenge for the death of his son, Asriel.

Biography
Asgore Dreemurr and his wife, Toriel, ruled the Underground together as they happily looked after their only child, a boy named Asriel. One day, Asriel found a lost human and took them as a second child. Soon, however, both Asriel and the human were killed, and Toriel left Asriel.

With the help of the leader of his Royal Guard, Undyne, Asgore plotted to collect seven human souls to break the barrier between the worlds of the monsters and the humans. He had been able to kill six already, and the seventh would be the young girl Jimmy. However, she was able to continuously escape Asgore and Undyne's various attempts at a capture.

Asgore was able to finally confront Jimmy near the exit of the Underground. He battled her mercilessly until she vitally wounded him. He told her to kill him and return to her home, but, much to the king's surprise, Jimmy disagreed and spared Asgore. But before he could leave, the king was murdered by the evil Flowey.

Appearances

 * THE POINT OF NO RETURN!? - Let's Play UnderTale 19 (First appearance)
 * THE ENDING! - Let's Play UnderTale #20