I've done the same for my characters.
Gameplay-Wise:
For Josh, he is very competitive and confident, and although he lacks experince, he is a fast learner with snowboarding. Which would make him a medium to medium-high tier racer. As for Chihiro, she does board, but isn't as good as the others, making her a low tier character. But because of their looks, I think most players would be drawn to them and play as them otherwise.
Character-Wise:
Josh would get some fans maybe because he's an okay guy at most times, but can get arrogant at times, warding people off. And because Josh is generally a good looking person, I think he would be more of a hit with the girls than the guys. With Chihiro though, I think she would get flamed quite a bit, with getting called an 'emo' all the time, and bashers telling her to get a life. It's a bit sad really that people can discriminated because they look a bit different.
Pairing-Wise:
Ho boy, I was hoping we wouldn't have to come to this.

But anyway, I can see Josh getting paired with Nancy a lot. Even if the pairing itself isn't canon. Other than that, I guess Pamela would be an okay match for him in my opinion. For yaoi pairings though, I can only see Slash being a good one. Chihiro would most likely get paired up with Damien, despite that she thinks that he is a poser. And generally I hate this pairing because it's so obvious, just because that they look alike, it dosen't mean that they should be together. And for yuri pairings, it would be Linda and Nicole, because they tease her all the time, they end up falling for her.
Note: This my and my opinion only. It should not be taken to heart. So please, no flames.
