Marume, a male Cocotama born from a pair of glasses, embodies the spirit of his origin through a scholarly persona. His owl-like form features light green plumage with darker-tipped wings and feet, accented by pale yellow markings and circular white patterns encircling his eyes like spectacles. He wears dark green pants and a graduation cap, both marked by a gold pencil emblem.

Driven by logic and intellectual curiosity, he concludes statements with a distinctive "~hoho" and dedicates himself to unraveling mysteries surrounding the wilting Sakura Tree and its ties to Haruka, the human protagonist. Though physically inept, his magic harnesses knowledge to solve problems, reinforcing his identity as a methodical researcher.

Arriving atop a wooden horse in his debut, he probes disturbances in Antique Sakura by scouring library archives for concealed truths. Partnering with fellow Cocotamas, he aids Haruka’s role as the Legendary Contractor by dissecting challenges with analytical precision. His formal title underscores his commitment to resolving conflicts through intellect and enlightenment, mirroring his purpose as a beacon of reasoned guidance.