@Fenrire At this point we just have to assume that the brains development doesn't take kindly to reincarnation. So you get defaulted into being a typical teen no matter how much you know.
Though he could also just be super childish despite living so long. Not like time and experience always "matures" a person.
Though he could also just be super childish despite living so long. Not like time and experience always "matures" a person.