Vivlos

An umamusume, Vivlos has long brown-black hair with a single white strand on her bangs in twintails decorated with criss-crossing blue ribbons of different shades as well as blue eyes with bright pupils. She wears a sailor hat decorated with the same anchor/stylized V insignia as her sisters as well as a single ear cover of the same style as her sisters on her left ear. Her impish nature is displayed by her constant cat mouth.

Vivlos is a cute yet cheeky little devil of a young lady. Growing up as the youngest of three siblings in a wealthy home means that she's been spoiled and pampered from a very young age. After a trip to Dubai left her fascinated and enthralled by all her sights, she began yearning to live a celebrity lifestyle in a famous country.

Armed with a natural talent and aptitude for running, Vivlos strives to one day compete in Dubai.

She's a uma musume. Horse girl. She has horse ears and a tail.

Based on the anime Monster Musume. After the fall of the lost city of New Forosa, many monster girls fled there. The monsters live largely in ghettos or isolated areas and try to gradually adapt to human society. But the process is slow, and they suffer a lot of discrimination.
Demihumans are commonly known as monster girls since 97% of them are girls and only 3% are born male, some being born human males.
ADIE is the organization that monitors monster girls

He is 19 years old