Valentine eggs are only seen once a year. Adults’ mating seasons are very short, usually spanning a few weeks in the mid-to-late winter. These dragons were once reputed to be omens of good luck in 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.

Britney is a loving, caring valentine dragon. She has a very calm nature, with a short temper. The only one who can make her angry is her rival, Shadow's Death. The black marrow dragon tends to get on her nerves a lot, and she usually loses it when he makes fun of her. She helps to take care of eggs and on valentines day, she obtains the ability to make other dragons fall in love, like the other valentine dragons. Em, the leader of her owner's dragons, has given Britney and Shadow the title 'loving angel' and 'hating devil'. They are also often called the Yin-yang relation, Britney being Yang, a gentle, caring, light dragon.