FiNaL_fAnTaSy_RoX
Ex-Soldier
It can be an influence from what the young kids wear in Japan, or their street fashion
I did read somewhere online about that, that many clothes featured in RPGs are based on what people wear in Japan. And since we arent from there then its different from what we wear in America. Riku's clothes may look different, maybe not gay, but different, but that may be what some people in Japan wear. So Riku is not gay at all even if he does have different clothes on than what we wear over here.