While exploring the Chamber of Secrets, Harry finds an old, ornate box, and inside it, a small blue doll that feels chilly to the touch and intrigues him greatly, for why would Salazar or Tom store something like that. He intends to takes it back to Prof. Dumbledore, until she speaks with him, with a voice he can't help but find alluring. Ranni, as she calls herself, teaches Harry of distant worlds and magic he has never heard of before(not that that's a big feat, given he's still a Second Year), along with the importance of self-determination. Harry knows, especially after the whole thing with the Diary, how dangerous she could be, but unlike the Diary, she feels comforting and seeks only to teach him more about magic and the universe, and how much he didn't know.
Ranni becomes his secret companion, teaching him the mysteries of the Cosmos at the Astronomy Tower under the bright Moonlight, and helping with counsel in his adventures. A year passes, and the Tri-Wizard Tournament is announced. Ranni asks Harry for a favor, to make her a new body she can inhabit and use, one of flesh and blood, and Harry, now somewhat smitten with her and the things she showed him through her magic, agrees. Ranni promises that together, they can travel the Cosmos and be free, for he has the potential to stand at her side.
Fleur Delacour arrives at Hogwarts with two main goals, win the Tri-Wizard and bring glory to herself and her School, and, as a Maiden of the Golden Order, find the next Elden Lord that was said to reside in this very school and bring them to the service of the Greater Will, so her family can finally return home and restore what was broken.