Colleena is a supporting character who appears in the ninth episode of the anime Those Who Hunt Elves. In her human guise, she works as a flower vendor in a town within the fantasy world where the series takes place. Her primary goal is to attend a grand ball at the Royal Palace so she can dance with a prince of the royal family, with whom she has fallen in love.

To achieve this, Colleena seeks the help of Airi, a member of the main trio, who must teach her how to dance properly for the palace event. A significant complication arises when Airi discovers that Colleena is secretly an elf. Unlike many other elves in the series who are forcibly stripped of their clothing to reveal magical incantation fragments tattooed on their skin, Colleena presents a moral challenge. Airi finds herself unable to tear Colleena's clothes off or even directly ask her to undress for the search, as her kind and gentle nature as a lovesick flower vendor makes the usual aggressive tactic feel inappropriate. This hesitation leads to Junpei, another member of the main group who is unaware of the situation, taking charge and handling the matter in the group's typical direct and forceful manner. The episode highlights Colleena as a minor character whose role primarily serves to showcase the different approaches of the lead characters, particularly Airi’s conflicted feelings, when confronting an elf who does not fit the mold of a simple target. No further information on her background, personality beyond her desire for romance, specific magical abilities, development in later episodes, or other key relationships is available.