I can't find enough information on this character to reliably translate her name: 相馬友子. Google translate showed me "aiba_tomoko", but I couldn't confirm it.

It's Souma Tomoko according to this wiki.
http://wiki.livedoor.jp/vxv0528/d/%C1%EA%C7%CF%CD%A7%BB%D2

Then why hasn't it been tagged as such?

I wasn't sure since it's from a wiki that I can barely understand.

Thanks for your help. I don't read kanji, and google's terrible with names, and I gotta tell ya this is one obscure character. Even for Haruyama.