Light Yagami - kakistocrati
One thing to take note of - this is post-Death Note!Light Yagami. Thus, yes, he is technically dead. Just as Ryuk said, he wouldn't go to Heaven or Hell, since he owned the Death Note. Instead, he winded up in the lovely city of Kingdom Crack, where his new life would begin. Since this is post series, he has lost possession of the Death Note - one of the key things that changed his character. He has all prior knowledge to the events, however. He does remember being Kira, he remembers owning the Death Note, and remembers all who he has killed. His sense of Justice is still intact, but he is less insane now that he has experienced what it was like to be dead.
So, he basically acts like he did before he had possession of the Death Note. Most of his actions cover up who he used to be, since nobody, sans about two people, know of his past. He pretends to be a charming guy, he pretends to be a kind individual, as well. He also pretends, if someone knows of L or anything else, that he doesn't know what they're talking about. He says his life was boring and average, and tends to keep to that story.
To fit in, he has developed an interest in someone who could be beneficial in someway; Suzaku Kururugi. He tends to be overprotective of those he is close to, and if he should ever come into possession of the Death Note again at any time, he has a mental list of who will die. He is prone to getting what he wants, and tends to act a bit off the deep end when he commits any crimes himself. Since Kingdom Crack knows no Justice, he has given up for the most part, at the moment. He's average and human, now. He doesn't have the powers and aids of a Shinigami at his side to be able to change things.
He's trying to be friendly and trying to make allies, in case he may ever need any.
So, if a L, Matt, Mello, or Near show up - he won't be able to do any harm. He also won't be attached to Misa in anyway, since he already has an item of affection, and already truly has feelings for this person. He also tends to flirt around, though he doesn't have any intentions of doing anything drastic. He was married for three days to Sheena Fujibayashi, to whom he has told his true identity to, both because of Dare Memes. He was the significant other of Claus for two days, as well. He seems to not be afraid of little games as these, and thus he'll most likely enter them often.
...more later? /o/;;