shishi_juugo
A character appearing in the Kishibe Rohan wa Ugokanai short story "Kushagara" (くしゃがら) from the series' novelization; a short story collection written by Kitaguni Ballad, which was later adapted into a drama episode.
An oddball manga artist going by a strange (pen) name, he grows a manic obsession with the eponymous banned word "Kushagara", going desperate as he searches for its definition.