All Might's muscular form was a unique result of handling him One For All and his injury. Deku cannot access a muscular form like All Might despite having the same Quirk.

The My Hero Academia manga might have confirmed Deku's feelings for Ochako by having him use his Quirk first and last to save her.

The previous chapter of My Hero Academia focused on Deku and his friends pouring their hearts out to attack All For One. He used the last few embers of the One For All quirk to fight the villain ...