OVA
Description
Karen Ichijo is a student in Class 2-C at Yagami High School, recognizable by her green hair and black eyes. Standing 160 cm tall, her birthday falls on January 7, making her a Capricorn. Her family consists of a mother (referenced but not depicted) and a younger brother, Kosuke Ichijo.

Outwardly quiet and reserved, Karen possesses remarkable physical strength matching elite athletes like Mikoto Suo and Lala Gonzalez, stemming from her training in the wrestling club alongside Kozue Mihara and Lala. Her wrestling expertise manifests instinctively; when threatened or challenged, her body reflexively executes professional moves like the German Suplex or her signature Nymph's Dance without conscious thought, often followed by a return to her normal demeanor and apologies. Beyond wrestling, she exhibits exceptional agility, demonstrated during the Sports Festival's Kibasen event where she scaled an opponent's pyramid to secure victory for Class 2-C. She also briefly joined the girls' basketball team and serves as the lead singer for her class band, showcasing vocal talent including English songs.

Karen works part-time at a moving company, known to colleagues as "Ichi-san." This job utilizes her strength but intensifies her self-consciousness about femininity, as she frequently outperforms male coworkers in physical tasks. She is responsible and diligent, exemplified by her commitment to duties like pool cleaning when classmates neglect theirs. Despite her shyness, she displays caring qualities, comforting Tenma Tsukamoto after romantic setbacks and refusing to target Mikoto Suo in a survival game to protect Megumi Sagano. Her introversion hinders expressing romantic feelings.

Her central narrative involves unrequited affection for classmate Kyosuke Imadori, drawn to him because he treats her with typical feminine courtesy, unlike those fixated on her strength. Attempts to gain his attention—guided by Tenma's advice or wardrobe changes—often falter due to Imadori's preoccupation with larger-breasted women and her own hesitancy. However, Imadori shows genuine concern, rescuing her from difficult situations. Their relationship faces tension from Imadori's interest in Mikoto and rival Kozue Mihara's similar feelings. In the "School Rumble Z" epilogue, misunderstandings cause Karen frustration and tears. During a wrestling match orchestrated by Imadori, she emerges victorious; he presents her with a ring while praising her beauty as a winner, leading to a tentative reconciliation. The nature of their relationship post-ring exchange remains undefined.

Karen maintains significant bonds. She is close to bandmates Ooji Karasuma, Takeichi Fuyuki, Megumi Sagano, and Tsumugi Yuuki, frequently lunching with them alongside Lala Gonzalez and Ootsuka Mai. Her dynamic with Lala blends friendship and competition; their initial encounter involving a German Suplex forged a connection, later working together at WAS Burger. While generally friendly with Mikoto Suo, they engage in intense athletic rivalries. Tenma Tsukamoto acts as her confidante, aiding Karen's romantic pursuits by supplying resources and substituting in wrestling matches to enable a date with Imadori.