User blog comment:Meishanoob/what is your favorite vampire?/@comment-25942629-20160102133302/@comment-25942629-20160102141246

Mika doesn't seem yandere or all that selfish to me. He's pretty heartless toward other vampires, but it's not like he's trying to completely own and possess his brother or anything. He's looking over Yu's best interests like a parent, and he knows Yu is hanging out with bad people. Even then, he gives in to Yu's pleading and takes him to see his friends. I don't see any evidence of him being yandere. He seems more unselfish than selfish for the same reasons. Even if Yu does not live with him or has nothing to do with him, he is willing to die for Yu and struggles with his vampirism for four years just to warn Yu about the Seraph of the End. He's really sacrificed and put up with a lot.

How is Krul obsessed with or fooling around with Mika?

Lest has only appeared once, so I can't say whether I like him or not yet.