Uma Musume Halloween

Appearance:
Long silver/gray hair with white streaks, bangs with a distinctive yellow diamond pattern, and large gray horse ears with a blue and gold hoop. His eyes are large and expressive blue-violet. He is of medium-tall height (167 cm) and athletic build. In the image, he wears a dark costume with a cape, gray horns, and is holding a huge jack-o'-lantern with a happy face. His expression is a mixture of enthusiasm and slight shyness.
Personality:
She is calm, serene, and composed, almost imperturbable. Very few things upset or anger her, which sometimes frustrates others. She is intelligent, obedient most of the time, and has a calm and mature presence. Although she can be a bit aloof, she is loyal and reliable. She represents the underdog who exceeded all expectations in her real life, and therefore has an aura of quiet determination and inner strength.

Gold Ship (the one with silver hair on the right, wearing a skull mask and wolf ears)
Appearance:
She has long, straight, silver/light gray hair with straight bangs that cover her forehead, rosewood (reddish) eyes, and gray horse ears. She is tall and athletic (170 cm). In the image, she is wearing a dark costume with a bat cape, an orange skull mask, and a small jack-o'-lantern on her head. Her expression is mischievous and energetic, with visible fangs and bat wings.
Personality:
She's a total, lovable firebrand. She has an extreme free spirit: one minute she's bursting with energy and pulling off elaborate pranks, the next she's lazy and doesn't want to do anything. She's mischievous, comically violent (famous for her winning kicks or dropkicks), temperamental, and capricious, but also intelligent and surprisingly mature with her friends. She loves having fun and playing pranks; her motto could be, "As long as it's fun, it's all good."

Haru Urara (the one with pink hair on the left, wearing a witch's hat)
Appearance:
She's a petite girl (140 cm) with light pink hair in a long ponytail that reaches her mid-back, short, messy bangs, and side strands framing her face. She wears a red headband and pony ears covered by dark magenta caps with a white bow. Her large, round eyes are bright pink with cherry blossom petal patterns in the irises, giving her a very expressive and adorable look. In the picture, she's wearing a witch costume with a pointed hat, a white and purple dress with orange ribbons, bat wings, and Halloween accessories.
Personality:
She is the embodiment of unwavering optimism and positive energy. Despite being famous for her losing record (she never wins a race), she never gives up, always smiles, and maintains a cheerful and motivating attitude. She is sweet, innocent, and a little clumsy (she's not the sharpest tool in the shed), but her smile brightens everyone around her. She represents the spirit of "never give up!" and is adored for her purity and contagious positivity.

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