Yeah shes def gay. She pays more erotic attention to girls than guys. And usually only thinks about getting a guy to score popularity/social standing points.
idk, she's had plenty of fantasies about dudes. remember that VA thing? i feel like her feelings toward yuu are very complicated. i think general teenage horniness is definitely part of it, but it feels more like she sees yuu as the ideal girl that she wants to become. i don't think she had any fantasies about her when yuu was her comrade in gloomy loner-ness. her lust for yuu is kinda a sublimation of her own desire to be hot and popular, but i don't think she's realized that lmao
edit: nvm, i just read the spinoff prequel. she's always been thirsty for yuu LMAO. she is bisexual, final answer