Daiwa Scarlet is a female Umamusume and is in the Junior Division, residing in the Ritto dorm with her roommate Vodka.

Unyielding, strong-willed, and cheeky, she wants to be number one at everything she does. She usually plays the role of the perfect, mild-mannered honor student, but the truth is that she hates losing more than anything else. If it'll help her be number one, she'll go through any training, no matter how grueling. She sees her rather showy roommate Vodka as both her motivation and her rival.