Nin, daughter of a duke and holding the Saint rank within the church, was once a member of the Hero's Party. She personally invited Rud to join, forging a strong friendship with him. When the party leader, Kyglas, unjustly expelled Rud, Nin fiercely opposed the decision and mourned the separation. Later, she and the other members quit due to Kyglas's incompetence, causing the party's disbandment.

Seeking Rud, Nin traveled to Avancia, accepting his earlier invitation. Upon arrival, she explained the disbandment and her wish to stay temporarily. Facing a lack of local inns, she accepted an offer from Rud's sister, Manicia, to reside in their home.

Nin is kind-hearted and excels at building positive relationships, though she openly criticizes those she deems deserving. Her interactions with Rud sometimes reveal tsundere tendencies, including playful flirting, hinting at deeper feelings.

As a combatant and supporter, Nin wields the [Blessing of Saintess] with high proficiency in both healing and elemental magic. She also displays an interest in unconventional cuisine, often seen eating obscured or pixelated foods on sticks. Integrated into Rud's group, she remains a steadfast ally during labyrinth raids, focused on collective goals while navigating evolving relationships.