What makes Vriska transfem?

I only just started transitioning. So you need to realize I've spent years rationalizing every bit of dysphoria and rejection and "god i wish that were me" as normal boy things. That's probably why I can't see the transfem Vriska vibes everyone else can. And I mean EVERYONE. There's obviously something to it and I just don't get it. Can someone explain it to me?