Cologne

Cologne was once Tsukikage Yuri's fairy partner in Heartcatch Pretty Cure!. He, along with Cure Moonlight, protected the Tree of Hearts until he died protecting her. As all other fairy partners have shown to give Pretty Cure their Pretty Cure Seeds, it is highly likely that he did the same. He was also Chypre and Coffret's upperclassman, making him possibly a powerful fairy.

Cologne was very calm and caring for his partner. Unlike the other fairies, he was mature and thought through his actions. He worried about Cure Moonlight constantly for taking the burden of Pretty Cure, but understood the kindness in her words.

Meeting Yuri
It is unknown how Yuri and Cologne met, although it happened while Yuri was searching for her disappeared father. He met before him and told her that she was chosen to be Pretty Cure, something she accepted. Together they fought the Desert Apostles, but Cologne worried that Yuri fought alone against two strong enenmies, compared to Cure Flower who only fought one. He suggested that she allowed Chypre or Coffret look for a Pretty Cure partner for her, which she refused.

Following Cure Moonlight's decision to acquire the Heartcatch Mirage to get stronger, he protected the junior fairies when Dark Cure appeared and challenged Cure Moonlight for a battle. With the arrival of Sabaku, Cure Moonlight was about to get killed by his dark projectile, but Cologne stepped between and took the hit, dying and disappearing in her arms.

As a Spirit
After Cologne died, his spirit survived and started to look after Yuri, worrying about her after her defeat. After finding her, he watched over her, unable to talk to be seen. However, when the Heart Pot was filled enough to bring a miracle, a projection of his spirit could be shown.

When Yuri gets to know this, she is teleported to the Tree of Hearts, where he meets her. He explains to her how kind and strong she is, and that she now is experiencing the meaning of friendship. Then, knowing that the present Pretty Cure is in danger, Yuri decides to ask the Tree of Hearts to become Cure Moonlight again, using the Heart Pot. As her request is accepted, Cologne's spirit fades away, watching over Yuri one last time. During Cure Moonlights battle with Dark Cure Cologne was able to incourage Cure Moonlight by calling out to her, reminding her that even though he may not be alive he will always be with her watching over her.

Relationships
Tsukikage Yuri: Cologne cared about Yuri's safety, even though he knew being a Cure is a dangerous job. He did his best to support her, and even after death, has been looking after her as a spirit.

Chypre and Coffret: Cologne viewed the two fairies as his juniors, seemingly acting like their older brother and protecting them from danger. However, he had faith in them, as he wanted Yuri to choose one of both of them to find a Cure to help her.

Etymology
Cologne: Like his name, Cologne is a type of perfume used by men.