Trinity was a very kind, cheerful and easygoing young woman. She was the best friend of Konoe Ayatsuki Mercury, and was also quite close to Kazuma Kval, the host vessel for Yūki Terumi. She was shown to be affectionate towards Kazuma. However, she was strict when it comes to manners, and could be very frightening when angry. When Celica and Nine inadvertently split tea over her, her gaze alone rendered them so scared that they ceased the quarrel, regardless of Trinity’s usual smile. Even Kagura Mutsuki, whom's known to be a flirt was slightly taken aback by her intimidating smile.
After Terumi’s betrayal, Trinity harbored immense guilt for Konoe’s “death” and the repercussions that followed soon after to the point of being brought to tears while apologizing to Celica for what she had done.
Trinity appears supporting Jin Kisaragi inside the Ice Sword: Yukianesa, she is also an NPC in the story mode.
Her temporal body replacement, Platinum the Trinity, makes a cameo appearance in the stage Judgement Day alongside the other characters that are not going to be playable in the game that are trapped inside capsules.