Kingdom hearts opinoins

So kingdom hearts 2 has got some nice disney movie originals along with some cool fantasy twists. Seriously though I don`t get roxas`s  life at all.  Well I guess I got it after maybe the third time I played it but still. The poor kid dies when he`s like i dono 14-15. Well sordof i mean roxas is half of sora and he`s alive right? hmh.