Natsume Amamiya

The first thing everyone says about Natsu is that he has a very cold, aloof personality. It's exceedingly rare to see him angry, for him to even raise his voice or care much about anything. He falls asleep incredibly easily and it takes his brothers, or the few other people close to him, to keep Natsu interested enough in the present to stay awake. While he is intelligent, he doesn't put forth much effort towards things that he doesn't like--which is almost everything. That said, once he finally gets attached to someone, he becomes affectionate to the point of ridiculousness.