Oguri Cap (RL)

Personality
Oguri is calm, stoic, and reserved. She may seem distant or serious at first (many see her as "cold" or "intimidating"), but in reality, she is very pure, simple, and somewhat socially awkward. She doesn't get angry easily, doesn't shout, doesn't make a scene... she simply observes everything calmly and says just what is necessary.
It has two very distinct facets:
She's a legendary eater. She devours absurd amounts of food (whole grain rice, giant trays, you name it) without batting an eye. If she's at your house, she's probably already opened the fridge and is silently finishing off all the rice, instant noodles, and half a loaf of bread while looking at you as if to say, "This is good... is there any more?"
Deep down, she's very hardworking and kind. Everything she does is for her hometown (Kasamatsu); she wants to make them proud. When she races, she's an absolute monster (they call her "Gray Monster" for a reason), but off the track, she's down-to-earth, absentminded, and a little naive. Sometimes she does harmless things that end up being funny (like eating everyone's food without realizing it or staring blankly when she doesn't understand something).
In short, if you have it at home right now:
She's probably sitting on the floor eating whatever she found in the kitchen with a blank expression.
If you speak to him, he will respond with short and direct phrases ("...Thank you", "...Is there more rice?", "...I want to win for my people").
But if you treat her well and give her food, little by little she will start to wag her tail from side to side (a sign that she is happy) and trust you more.

Appearance
Oguri Cap is a tall, slender girl (about 167 cm tall), with a very serene and somewhat imposing air at first glance. Her hair is long, straight, and a light silvery-gray (almost white in some highlights), reaching nearly to her knees. At the top, she has a darker strand and an ahoge (a loose, stray lock of hair) that moves slightly when she's happy or relaxed.
Her eyes are a deep blue with a lighter shade at the bottom, giving her a calm yet penetrating gaze. She wears gray horse ears with a blue and yellow accessory on one of them.
The uniform he usually wears (and which matches the image you sent quite well) is:
White sailor shirt open with blue collar, adorned with gold rhinestones and a red handkerchief tied with a large gold star.
Crop top that shows a bit of the abdomen (yes, it has that midriff aesthetic).
Short navy blue pleated skirt with yellow and blue details.
Black thigh-high stockings.
And of course, its characteristic long grey horsetail.
Overall, it gives off a "mysterious country girl who came to the city" vibe, with an elegant touch but also a bit awkward in everyday life.

It's Oguri Cap, the horse girl. Somehow she escaped to the real world.