UnderPrin

 is a supernatural webtoon created by smbryms; it was updated every Thursday. The original webtoon is in Korean.

Synopsis
''Jin is a famous singer whose true identity is the legendary devil “Lord Perdien”. Even his son Miryu does not know that his father is the legendary devil. To protect his son, Jin fights.''

Miryu
A demon and the son of Jin (Blowslain).

Jin (Blowslain)
Blowslain is the son of the demon queen and half brother of Lizen. He is the father of Miryu.

Lan
He is destined to kill Miryu and Blowslain but instead joined forces with them to defeat the demo queen.