Cologne

Cologne is once Yuri's fairy partner in Heartcatch Pretty Cure!. He with Tsukikage Yuri once protected the Tree of Hearts until he died protecting Chypre and Coffret. It's speculated that he gives Yuri her Pretty Cure Seed to transform into Cure Moonlight.

Cologne is very calm and somehow caring for his partner.

Meeting with Yuri
It's unknown how both Yuri and Cologne met before the Tree of Hearts. Though it's speculated it occurred after Hanasaki Kaoruko retired as a Pretty Cure. It's also unknown how many battles they both encountered against the Desert Apostles.

Sacrifice
During the events of Episode 1, he somehow got killed by Dark Cure while protecting Chypre and Coffret. This somehow left a scar at Yuri's heart as she tries to take revenge against Dark Cure.

As a Spirit
When Yuri is teleported to the Tree of Hearts using the Heartcatch Mirage, she then encountered his spirit. Cologne is glad he saw her again after many years.

Relationships
Tsukikage Yuri: Cologne sometimes cares about Yuri's safety even thought she's a Cure

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