Huh. I beat her first try, even though I haven't played the game in almost a month.
Ghost is bullshit. The teleporting and shurikens are enough when she does them alone, but sometimes she throws a shuriken and then teleports 1 frame after. And on top of this, she takes 12 hits to defeat.
I think of her as Shin Akuma in Tekken 7 but he only spams the invincible teleport and Hadoken/Gohadoken. There's also no sidestepping.