Oh, I didn't notice anyone else with the nickname Red. I just saw yours as Rose, so I figured y'know, I could use Red too. If you don't want to change yours, I could just get rid of the nickname, but I think it'd get tiresome to call her Rose Red all the time. If you do change it though, I'll switch over to Rose for the person who has Red. 
 

^ sorry if that was a bit confusing, I almost lost myself while typing it.