No, no, Kat was wearing the headband thing because she's afraid people are thinking of her as less girly (/a lesbian? can't remember if that's canon or fanon atm); so she was affecting pink and flowers to try to counteract it. Ah, here's the page: http://www.gunnerkrigg.com/archive_page ... micID=1033
. Gamma wasn't just stealing it, she was saying, don't worry about that, stop trying so hard: be who you are. Even if you're scared of what people are thinking. "You can't always run from what scares you."
...That's about the only insight I can add right now, though. Hopefully Annie explains some of it next chapter or in the next few pages or something.
(also, her father is suuuuch a jerk. i understand he has issues but that doesn't absolve him of the responsibility to try
not to hurt every
single person he's ever met. go zimmy.)