Protagonist: Benson, Kevin
Protagonist’s dad: Benson, Abt
Succubus: Betty, Bonnie
Elves: Emily, Tiffany
Feather Clan: Alina, Sheila
Two protagonist brothers and eldest brothers: Burgette
The devil can be chosen from Western mythology or Eastern mythology. The Western one looks like Satan, Lucifer, the Eastern Journey to the West, or the Satan from Sword of Immortals. The name can be slightly changed.