Awesome callback! Would love to see an Idolm@ster collab with Ridge Racer if 8 ever becomes a reality! Which since arcade racing games are all the rage now, it’d be a prime opportunity for Namco to cash in!
What the hell is a nelson position? I'm pretty sure that one is called missionary, though I guess you can call it whatever you want. I personally don't call it that because I think it's a stupid name for a position.
I'm not sure about her hair color. It looks kind of pink on my monitor, but I think it might be more like blonde/silver under a specific kind of light source. Feel free to edit it.
It's supposed to be blonde, but combined with the lighting the color looks pale enough to be mistaken as silver.