Kakeru Keshi works as an assistant in the manga team G-PRO, specializing in erasing pencil marks from manuscripts. His surname, Keshi, meaning "erasure," directly references his primary duty. A graduate of an art university where he majored in Japanese painting, he deeply admires the artist Kairi Imashigata, later discovered to be Hime Gotō’s grandfather. This connection emerges when Kakeru finds a painting by Hime’s mother in a Kamakura warehouse, confirming Kakushi Gotō married into Kairi's family.

Kakeru exhibits poor situational awareness and awkward timing, frequently making careless remarks that unintentionally cause trouble or worsen Kakushi Gotō’s anxieties. Despite his good intentions, his actions often backfire. For example, after being told he couldn't model for muscular characters, he took a month off to rigorously train and achieve a bodybuilder's physique. Similarly, he once trained to hold his breath for three minutes based on a misinterpreted comment about reader engagement. His stubborn nature compels him to pursue such unconventional solutions with intense dedication.

In a flash-forward timeline showing Hime at age 18, Kakeru is employed by Tonpo Pencil delivering stationery. Following Kakushi Gotō's memory recovery in the anime adaptation, Kakeru transitions to assisting Rasuna Sumita. His tendency to stumble upon secrets or ask poorly timed questions frequently drives the plot forward, especially when other characters avoid sensitive topics.

Physically, Kakeru has black hair and green eyes. While usually depicted as a standard young assistant, he once drastically transformed his physique into that of a bodybuilder to meet a perceived professional requirement. His background in Japanese painting and reverence for traditional artists like Kairi Imashigata occasionally influence his perspective, though his core role at G-PRO remains the technical task of erasure.