Poltergeist

Poltergeist (ポルターガイスト Porutāgaisuto) is the Quirk used by Akari
Description 
This quirk resides within Akari's hands, due to this quirk, Akari's hands have a constant black aura, and appear black. Similar to ghosts, Akari when using her quirk, can completely control any object, she is pointing at. This can be as small as making it float, to throwing it or manipulating the size, although the latter, being very tough for her to pull off. There is a rule that is applied for her quirk, the less objects she has, the easy they are to control, this rule also applies to how heavy an object is. An example of this, is if she takes control of 2 rocks, she'd easily move them, whilst if she took control of 100 buses, she'd have a harder time controlling them.
Weaknesses
Ignoring the already mentioned weakness, there in another weakness that ties into what has already been mentioned. The longer and harder Akari uses her quirk, the more of a toll it take on her head, and eventually she'll begin to get headaches and the more she uses her quirk from there, the worse the headache will get, until she passes out.