Coppe

Coppe is another fairy from the Tree of Hearts. He is of higher rank than Chypre and Coffret, making the small fairies admire him very much. Although he never talks, he observes Hanasaki Tsubomi and Kurumi Erika. Like Chypre and Coffret to Tsubomi and Erika, Coppe is the fairy companion of Hanasaki Kaoruko, who in the past was Cure Flower.

SpoilerThe Mysterious guy is Coppe's human form in which he appears whenever the Pretty Cures or something related to them were in danger. In the 32th episode, his ability to turn himself into a human was revealed.
Hanasaki Tsubomi seems to have a small crush on him until she found out he (The Mysterious guy) and Coppe were the same person. He is modeled after Kaoruko's husband, Hanasaki Sora. Kaoruko says that the reason for this is that Coppe wanted to stay close to her and therefore took the form of who she loved the most.

MAL