Hanako Koyanagi, later Hanako Kabakura, works alongside Narumi Momose, Hirotaka Nifuji, and Tarō Kabakura. Initially Narumi's senpai, she presents a professional image at the office, marked by her gray blazer, mint green blouse, and oval glasses. Privately, she embraces diverse otaku pursuits like gaming, reading yaoi manga, and crafting BL doujinshi. Her most guarded secret is her acclaimed identity within the cosplay community, renowned for her portrayals of male characters, a passion ignited in her third year of high school. Hanako and Tarō Kabakura first met as rival high school volleyball captains, often clashing over gym time. She once leveraged a compromising photo of Kabakura reading manga to secure practice for her team. Their dynamic shifted when he taught her a jump serve, sparking mutual respect. After his graduation, they began dating, though their recollections differ on who confessed first. Kabakura introduced her to anime and manga, cultivating her otaku interests, which became central to their enduring bond. Her personality blends contrasts: outwardly strict and admired by colleagues, yet privately short-tempered and prone to jealousy, with a fondness for risqué humor. She frequently worries her arguments with Kabakura might damage their relationship, revealing insecurities about not matching his usual preferences. Her fervor for cosplay and fandom remains vital, leading to collaborations with Narumi on BL projects and spirited debates over character pairings. She enjoys alcohol but possesses low tolerance, resulting in comical incidents during social gatherings. Their relationship evolved from high school sweethearts to marriage in Volume 9, adopting the shared surname Kabakura, causing occasional workplace confusion. In Volume 11, Hanako announced her pregnancy, eliciting an emotional response from Kabakura. The series later depicts them with a daughter, whom they introduce to cosplay and their shared hobbies. Beyond Kabakura, Hanako forged strong friendships. She bonded with Narumi over BL and gaming, using nicknames like "Hana-chan" and "Naru," collaborating on doujinshi and playfully debating fandom preferences. She also shared drinks and horror outings with Hirotaka, observing his social growth and expressing genuine camaraderie. These connections highlight her role as a unifier within the group, seamlessly merging her professional and otaku identities.