Seikasz
When little Izuku was told he had no quirk, many would think he gave up and never wanted to be a hero again.
But quite the opposite, Izuku became even more determined to be a hero, training, creating, and managing.
He wasn't going to give up so easily.
He wasn't going to be an easy target for ridicule.
With or without a quirk, he was going to be a hero, whether the world wanted him to or not.
And so... he did just that. He created his own "quirk" inspired by Mirko: rabbit ears, a tail, and mechanical legs.