her quirk is similar to yours then,

she can freezing time, rewinding, slowing down, but she's not capable of speeding time, and if she's touched, the person who touched her will be unaffected by her quirk.

while her space manipulation capabilities, she can create time windows that can absorb long range attacks, or store any objects so this is very much close to dimensional storage, in addition to that, with that time window, it can duplicate any fabric of reality as long it touches the window, which means she can duplicate an attack of an opponent or some sort. The downside to her quirk is, her usage depends on number of hours of sleep, the more she uses her quirk the drowsier she gets, then once reaching her limit, she falls asleep and that frustrates her because there isn't any indication, that's pretty much it.

I didn't want to fully think about her quirk capabilities since i'm doing this art just for fun, and she wouldn't make it to the show anyway if you consider her quirk OP xD