After the First Task ended, Fleur could not believe the one she had called a little boy, the one she had dismissed, was capable of getting so far ahead of her, but her anger turned into intrigue when she found him singing by himself in the grounds of Hogwarts. (Harry is very good at Singing)

Issei Hyoudou; a boy with an abnormal past. The descendant of Albion and Merlin Ambrosius, who also wields the Sacred Gear, Divine Dividing. Very OP Issei.