Any ideas for pink haired-characters? Especially ones with a matching second costume?

My friend and I want to dress up for a concert, but i have pink hair and really don't want to wear a wig (not really mosh-pit suitable). We're looking for two-person cosplay ideas where at least one character has pink hair. We're not fussy about gender (we're both fine with doing drag or genderbent versions). If possible we'd rather avoid couples, but if a couple costume ends up working best then so be it.

Ideas so far include: - Patrick/Spongebob - Wanda/Cosmo - Bubblegum/Marceline - Starfire/Raven - Team Rocket - Amy/Shadow

But a lot of these are couples. Any other ideas? Note that we're avoiding Ramona Flowers/Scott Pilgrim, as well as MLP characters. I've included pics of some of the cosplays we found while looking. Thanks :)