All For One allows the user to steal the Quirks of other people and wield those stolen powers as their own. It also allows the user to redistribute stolen Quirks to someone else. The process of giving and taking away Quirks is done through touch, through a hole in the palm of the user's hand, once it receives contact.And whay was is real quirk?All For One's Quirk allows him to steal other people's Quirks, leaving them Quirkless, and wield the Quirks as his own.did he steal a kid with 火災, 火 breathingquirk and use it when he was In UA, when he was dateing inko that make so much better now.