Erasure allows Shota to cancel out the Quirk of anyone he looks at.
When Erasure is activated, Shota is able to disable a person's Quirk Factor until he closes his eyes. Shota only needs one part of the target's body to be within his sights for Erasure to take effect. Since most people in the world rely on Quirks for combat purposes, this makes Shota an extremely bothersome opponent for anyone to deal with.
Erasure also seems to generate an anti-gravity phenomenon around the user's head while active, which Shota has incorporated into his use of the Binding Cloth.
As shown at the start of Tamaki Amajiki's fight with Toya Setsuno, Soramitsu Tabe and Yu Hojo, Erasure can be activated on multiple targets at once, and stays in effect even if the user looks elsewhere, as long as their eyes stay open.
Erasure requires the user to see the target's physical body in person in order to activate, which can be avoided by simply hiding behind obstacles or obscuring the user's vision. It also doesn't count if what the user sees is merely a construct controlled by the opponent, such as an object inhabited by Joi Irinaka.
The effects of Erasure can last as long as Shota can keep his eyes open after activating it. Whenever Erasure is deactivated, Shota's hair falls down to its original position, which an observant enemy can take advantage of by predicting a potential opening for an attack.
Erasure does not affect appendages originating from Mutant-type Quirks, but it can impair their function as the Quirk Factor that incorporates all the mechanisms necessary for a Quirk to work properly will be temporarily nullified. Physical strength or abilities not derived from Quirks are unaffected.
The after-effects of the injuries he sustained during the U.S.J. Incident had negative consequences to Shota's Quirk. There is now a recharge interval between Erasure's deactivation and a new activation, with Shota requiring said interval to pass before he is allowed to use his Quirk again. This allows fast enough opponents an opportunity to counterattack should they notice that Shota isn't affecting them with Erasure.
Shota suffers from dry eye syndrome, which limits the amount of time he can keep Erasure active. Because of this, he carries a small bottle of eye drops with him at all times.
Shota's usual battle tactic consists of canceling an opponent's Quirk, forcing them to fight on even ground, and then using his Capturing Weapon in conjunction with his superior agility to defeat or restrain his adversaries in close combat.
Shota wears a pair of goggles that hides his eyes from view, preventing opponents from seeing who he is looking at and when he blinks. They serve to protect his eyes as well.
- Dry eye syndrome - Wikipedia article about the medical condition that manifests on Shota when he overuses his Quirk.