Asriel Dreemurr

Asriel Dreemurr is the final boss of the game, Undertale.

History:
Asirel is the son of Asgore and Toriel, adopted brother to Chara and prince of the Underground. One day while exploring the Ruins, he found a human name Chara, who fell into the Underground by accident. Asirel take Chara to his parents, whom they adopt as a sound son and best friend to Asriel. But that happiness soon end when Chara became sick and died. Chara made one made request to Asriel to see the golden flowers in his village. Upon Chara's death, Asirel adsorb his soul to carry his friends body to cross the barrier. Upon entering the village, the townsfolk, who they though Asirel attack and killed Chara, attack the prince, but didn't fight back and fled. Asirel end up mortally wounded from the fight as he return to the Underground and died. Upon his death, Asiriel turn to dust, which spread across the garden. Alphys, the royal scientist, inject determination into one of the garden's golden flower and Asriel was reborn as Flowery.