Peacock Tail

Peacock Tail (ピーコックテール Pīkokkutēru) is the Quirk used by Shirotori
Description
Once this quirk begins to develop, Shirotori began to grow a peacock tail, that stays with her for the rest of her life. The feathers can come off, and be controlled by Shirotori, the feathers are light like normal, but are as tough as steel. These feathers can be brought together, and will stick to each other, then they can used as shields or anything. The amount of feathers, Shirotori has at age 16 is thought to be around 180. Shirotori has complete control of all 180 of the feathers, and it is very easy for her to control them all.
Weaknesses
Once Shirotori has used all her feathers, she doesn't regrow the feathers too quickly, it takes about 3 minutes to regrow one row of 36. In total, it'll take 15 minutes to regrow all 5 rows of 36. Apart from this, the quirk doesn't have many weaknesses.