>>90321050Because she's too strong to graduate.
Really, if she ever was going to, she'd have done it before now. She's had so many chances where it made more sense to graduate than to stay. But here she is.
Since debut she's been through more than almost any other Holo. And even more, her teenage life was a series of traumatic events. Her psychological development as a person has been scarred because of it. But like a cockroach she's survived it all and just keeps pushing forward.
