Asriel

Asriel Dreemurr, formerly Flowey the Flower, is the son of Asgore and Toriel Dreemurr, therefore is the prince of the monsters. One day, he and his family adopted in Chara, a human he had helped when they had fallen into Mt. Ebott. He died the same day as Chara due to their plan failing. He comes back as Flowey when Alphys does an experiment on the patch of flowers his dust had spread over, in which she injected DETERMINATION into them. Many years later, he regains his SOUL and his original form thanks to Papyrus.

Appearance
Asriel is a goat boss monster child that has a small tuft of fur on his head and has long, floppy ears. He resembles a Nubian goat.

He wears a light green shirt with bright yellow stripes and black pants. He also wears a Best Friends locket similar to Chara's.

Trivia

 * Out of all the monsters, Asriel has the most DETERMINATION due to Alphys bringing him back to life as Flowey with it.
 * Undyne has the second most, but apparently has less than Flowey/Asriel since she never had access to SAVE files or the ability to RESET.
 * Asriel was the one who gave Chara their Best Friends locket.