Radiant Angel Dragons are known for their intuition—they always seem to know when someone is feeling down, and will do what they can to provide cheer. These dragons are curious and will poke their noses into anything. They communicate with one another by making sounds similar to singing. It is said that the golden feathers shed from their whiskers can rekindle lost feelings of love.

Dragons are highly-intelligent reptilian creatures that—from a human perspective, at least—appear to live forever. Many different varieties of dragon exist, each with their own unique qualities, habitats, and behavior. Adolescence in dragons is usually marked by the growth of a hatchling’s wings, although not all breeds of dragons grow wings and some breeds have other traits that indicate the beginning of maturation. In Galsreim, dragons and humans coexist peacefully.

Aile Radieuse is one of the most popular dragons in Shoroneko's group. Most of the females who does not have a partner are dreaming to have him as their dragonfriend, for he's beautiful and caring. However, Aile Radieuse feels quite embarrassed by all of those feelings for him. He prefers to help as much as he can and is of a great help to Shoroneko by taking care of the newborns.

Aile Radieuse was found during the Valentine's Day. When he hatched, Shoroneko was amazed by his beauty. Later, when he spreaded his gorgeous wings of gold and red, she granted him the name "Aile Radieuse", which means in French "Radiant Wing".

Aile Radieuse is always flying around in search of abandoned eggs that Shoroneko could take with her. He's very sensitive and kind, but he can also be a real coward. One day, he saw the egg of Fever Sun, the first Hellhorse Dragon of their group. Curious, he poked it with his nose and the egg hit him in return. After this event, Aile never tried to poke an egg again.