Evil little punk, or tortured softy?
Calvin is very cocky and loud. He is outgoing and a but of a punk. He isn't afraid to speak up and believes himself to be a lady killer (in more ways than one). He is convinced that he is evil, because of all the people he's had to kill. However, he doesn't enjoy it and never has. Calvin mourns for the ones who've lost their life sustaining him, and wishes he were brave enough to kill himself in order to save the lives of future victims. Unfortunately, although as an emakai he only needs to feed about once every month or two, any longer than that and he'll lose the ability to keep up his human appearance and any sense of reason. Which will lead to a rampage of pulling apart and eating anyone in site. So he keeps on killing, fearful of that ever happening. This way as many people as possible keep their lives. The punkishness described earlier is more of a front so people don't see the depression he lives with. Also he's just little over confidant with his strength and girl getting abilities!
Calvin lives at home with his family of five. They are completely average except for the emakai thing, and the fact that they don't own any cars or have any human food around. He has 2 sisters that are much younger than him, and their fridge is stock full of human body parts as younger emakai need to feed more often. There are many legends and theories as to how and why emakai exist. Some say they evolved like any other creature, others believe they were created in a lab of some sort. No one actually knows.