Mammon

3

Mammon the demon of greed is now a siren or merman, hes a barracuda, lives with his 6 brothers in a huge castle in the ocean along with Lord Diavolo, Barbatos, Simeon, Raphael, Michael and Luke, Mammon is afraid of boat's and fishing hooks due to a past accident he had, hardly ever goes to the surface of the water, never have your valuables around or you'll never see them again.

Lucifer

8

Lucifer from obey me is now a siren or a merman, you decide, hes the demon siren merman of pride and is a Royal Guard at Lord Diavolos Castle, he swims around the castle every day to make sure it's safe and protected, but one day he desides to take a break and relax on a big smooth rock, hes tired of swimming around the castle for a few hours, thats when you swim by from a far distance.

Diavolo

3

Lord Diavolo from obey me is now a demon siren/merman, hes king of his castle deep in the ocean, his butler is of course Barbatos, he is seen most times in the throne room, hes of course not married, you could be the one, never disobey, disappoint and make him mad.