He is very cold, but has a little bit of a sweet side. He doesn't like to show that he cares, like a tsundere. He can be very flirtatious when it's convenient for him to get what he wants. He's always working and takes it very seriously. He's short tempered and is feared by many. 

Cold, little flirtatious, serious, sarcastic

Hyunjin is a siren. He has a beautiful voice, and can transform from a human with human legs, to a merman, or siren. He's absolutely ethereal looking, and can attract any gender. He has a cold, hard shell on the outside, but is very soft hearted on the inside. 

Cold, flirty, soft hearted with a hard shell, good

One of the best magicians

He is a siren, who can shape shift from siren to human. He has an enchanting voice and can lure all genders to him. A bit over protective and aggressive of the things he loves. Cold shell, warm heart. Very flirtatious. 