Nicknames include "Gentil" and "Gentil-san." Her alias is "The Fortitudinous Noble Lady," which serves as her catchphrase and title.

Incidentally, Gold Ship calls her "Don-chan."

She is the fourth winner of the Triple Tiara in the Tiara line (Fillies' Triple Crown). Her strength is frequently discussed by Verxina, who competed in the same Tiara races and finished second in all of them.

She is a Horse Girl who exudes the aura of a queen, possessing absolute pride in her own strength and never losing her fearless smile. She is a meritocrat who believes "strength is justice," and she is never soft on herself or others, appearing cold-blooded at times. She is viewed as a powerhouse both inside and outside Tracen Academy, and reporters treat her as a horse girl under "extreme scrutiny." Being fundamentally a good person, she shows a sensible and kind side when competition is not involved.

While her speech and gestures are elegant, they are also provocative. She possesses unwavering confidence backed by supernatural physical strength. However, she is never satisfied with her own power and shows a stoic side, never neglecting self-improvement through weight training whenever she has time. According to Royce and Royce, she has a habit of moving primarily on her right leg during training and races.

Her rival Verxina describes her as "arrogant and haughty" and "a terrifying person who focuses solely on seeking power without regard for others," but at the same time respects her natural talent and her attitude of constantly honing herself through strategy to win. In Verxina's story, she is somewhat exasperated by the dense trainer and offers advice on how to handle Verxina.

There are many who approach her legally.

She keeps a Doberman named "Domina" at her family home. Being Gentil's dog, one might expect a submissive dog with a glossy coat... but it doesn't stop there; like its owner, who plays lightly with 10kg dog dumbbells, the dog possesses considerable strength.

Her roommate in the dorm is Buena Vista. While many Horse Girls are intimidated by Gentil, Buena Vista treats her brightly, earning Gentil's respect.

In history, she was the primary mount of Yasunari Iwata (though ridden by multiple jockeys) and a double-crown filly for the same owner (Sunday Racing). Together, the two roommates won 13 G1 races. On the other hand, their fates were contrasted: Buena Vista might have won the Japan Cup twice if not for a disqualification, while Gentildonna won the JC and went on to win it twice in a row, narrowly avoiding disqualification but keeping her rank.

She has finished her wedding ceremony with Guest and is now living their new life together.