Yes, I hadn't really thought much about it, but Persona 3 has a horribly back-loaded plot. It doesn't help that you get your final three characters at the end of summer (August), which doesn't leave much in way of character development. Fair enough, one's a dog, so I guess Koro-chan doesn't need​ an amazing story, but the Ken/Shinji dynamic is something the game could've explored in much greater detail than what was given.