It's Sora and Kairi's son. Totally fictional.

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Because of genetics, it gets pretty complicated, you see, the dominant traits in kairi and sora, were brown hair, but they each had blonde as thier recesive, so the recesive became the dominant in him.
Oh, I need help naming him.
That not the reallll reason. I this Kairi way messing around with Roxas. Does that count as cheating, they are the same person????
No, with genetics, it's not that easy, you can't have traits from three people, only a man, and a woman. It's biology, take the class.