Kylesriel Believah

"Jara wasn't a good person. I realise that now" - Kylesriel to Lusk

Kylesriel Believah is the son of Torya and Asgore, making him the prince of the underground. He is the UnderEK version of Asriel Dreemurr: http://undertale.wikia.com/wiki/Asriel_Dreemurr

He has three forms: one being Kylesriel as a child; another being adult Kylesriel or the Absolute God of Hyperdeath; and the final being his flower form, Kyleli. He is the final boss of the Pacifist Route.

Species/Appearance
Kylesriel is a boss monster.

As a child, Kylesriel wears a green and yellow striped shirt, grey pants and has no horns or fangs. He has two ears and his fur parts with shags in the middle.

As the Absolute God of Hyperdeath, he has the same hairstyle and he has two long horns. He is clothed in a purple robe with white sleeves and white pants. Two rainbow coloured wings sprout from his back.

Personality
Kylesriel used to be caring and trusting before he was reborn as a flower and his missing soul meant he couldn't feel love. At the end of Pacifist, he realises his evil deeds and apologises to Lusk for his actions.

Abilities
The following attacks are all used only by his Hyperdeath form. He can use fire magic, like Torya and Asgore. He throws stars at Lusk which explode into smaller stars and sometimes the stars spin anticlockwise. He also has control over lightning and seems to be able to summon blades which fly at Lusk. One of his attacks summons a monster similar to Alya's determination extractor and the Gastthew Blastthew. It creates a vortex that sucks Lusk in and fires diamond shapes that hurt Lusk on contact. It is impossible to harm Kylesriel, any attack results in a miss.

Backstory
Kylesriel found Jara after she fell into the underground and cared for her along with his family. Jara and Kylesriel became close friends after she joined their family. Before Jara's tragic death, she asked Kylesriel to bring her to the golden flowers of her human village. Taking her soul allowed him to travel to the surface, where he was misunderstood as an evil monster and attacked mercilessly by the humans. He returned to the underground, badly injured and died upon a bed of flowers.

When Alya, the royal scientist, took the flowers for an experiment, she injected determination into one of them. Seeing as the experiment failed, she replanted the flowers. One of the flowers, now injected with determination, had Kylesriel's memories and became Kyleli the Flower. However, Kyleli didn't have a soul so he became unable to feel love.