Kulumil is a young fairy and one of the three non-human children who become allies of the protagonist Tristan in The Seven Deadly Sins: Grudge of Edinburgh. Her parents, along with those of her companions Minika and Tyrone, are captured by Deathpierce, who intends to use fairies, giants, and demons to create chimeras. When the children are rescued from the Empties — Deathpierce’s magical automatons — by a mysterious fairy archer later revealed to be Lancelot, Kulumil joins the group journeying to Edinburgh to free the imprisoned adults. She is impulsive and headstrong, and her eagerness during a spying mission leads to a rampage that exposes the group, forcing Tristan to step in. Over the course of the adventure, she develops a noticeable infatuation with Tristan, regarding him with admiration and growing affection. As a fairy, she possesses gossamer wings that afford her high mobility, and she fights primarily with a bow, demonstrating precise archery. Kulumil’s role is that of a spirited and determined companion who contributes to the rescue efforts and brings warmth to the group. Through her interactions with Tristan, she learns to temper her rashness and becomes a braver ally, growing from a frightened child into a steadfast participant in the struggle against Deathpierce’s campaign.