Girl in Red is a singer who is a member of the LGBTQ+. So if a girl asks another "girl in red?" they're asking if she's into dating/likes girls, seen as listening to girl in red is gay girl culture
the type of girl you need in your life because she different from any other girl she deals with so many people making fun of her name. she pushes though all the drugs and self harm and she tells her self she's enough, and always will be.
popular kid: is that Tristan?
my best friend: yes that's Tristan you should be friends with her she is really cool.
Tristan: hey bestie wanna go to the mall?!
bestie: ofc lets go girl Tristan