If I were her I'd start a career as a shrine maiden. I'd look pretty silly being a grown man in the little miko outfit but I think she could pull it off.
Apple hates cute punk kouhais and has hardwired anti-cute punk kouhai countermeasures into every iPhone. You can counteract this by not buying their overpriced garbage and using an android instead.
My heart weeps for the man who pines for a girl that is yandere for another.
That said, she dropped her mark, so she was nae true yandere in the first place.