Due to CTQ stuff, I'm taking over this review. This does not mean Janus' points are irrelevant, take his points into account when viewing mine.
REQUIRED
More details on frostbite, either in profile or not. You can toss in minor Grimm in histories as a little flavor of the location, but considering this is a unique boss Grimm it needs info, even if it's dead
Add more weaknesses, as far as I can tell her only weaknesses are being light weight and not durable.
REQUESTED
Simplify occupation/give better descriptor - a good descriptor immediately gives the reader and idea of what the character does. “She does what she wants” leaves the reader only knowing what's said, they don't know what that actually entails or what she wants.
Appearance could use some expansion, a picture isn't an excuse to skimp on descriptor - this is a writing site, you should use as many opportunities as you can to flex your writing muscles
Reword or redo the “a highly precise control over her aura before schooling even started” bit to better reflect the skill level of what was most likely a 13-14 year old - while an early start and parents already highly skilled in aura use are undoubtedly an incredible boon, I'm hesitant to think one could learn highly precise control in a year of unlocking their aura. More advanced control than others her age? Sure. Highly precise? Ehhh
Reword or redo the “Nazar was the first to go, having been invited into a special training program with the Kingdoms to combat rogue huntsmen/huntresses” bit to either specify it was not the Inquisition and why or have it be a non-Inquisition group and why - since the Inquisition requires a Hunter License, he would not be allowed to join them. That said, the Inquisition is often tied in laws and regulations to the point where they can't set foot on Atlesian soil. It's not beyond the realm of believability to say there a non-official group taking care of business that the Inquisition can't or won't.
Reword or redo the “Akane is also an excellent teacher, being able to spot the flaws in anyone’s fighting style and giving suggestions on how they can develop effective ways to rectify them.” bit - while the trait itself is fine, it has no basis in the history, while she worked together with Khan, the only mention of teaching is tutoring underclassmen with no explanation of how she learned or came to the point where she gained this trait.
Fix “However, Akane is able to enter supercell form, where she stays in one spot and rotates the cloud around her at high speeds until it generates powerful enough bolts of electricity. She is able to continuously spin up, collecting more blood and electricity and rotational speed before blasting it all outwards to knock back and electrocute enemies. However, due to the exponentially increasing cost of her semblance, it exhausts her quite a bit.”- as discussed in CTQ, it will require lightning dust.