The one on top is Yaotl Nanna Thaumiel. She can see the bad side of the future of a single person.

Her nickname is Ying.

She's about 6'00.

This is Ying's twin sister Qwara Kairi Thaumiel. She can see the bad side of the future for a whole species.

Her nickname is Yang.

She's about 6'1.

This bad boy is Xerxes Xiuhcaotl Apollyon. He is the human embodiment of every illness, sickness and stuff like that. The gem thing is the only thing keeping him 'alive'.

He's about 10'10 alone.

His nickname is X