OVA
Description
Kō Yagami joined Eagle Jump at 18, straight out of high school. Winning an internal design competition earned her appointment as lead character designer for "Fairies Story," a game that inspired Aoba Suzukaze to pursue game development. This rapid promotion caused resentment among senior colleagues, leading to workplace bullying where Rin Toyama remained her sole friend and supporter. Despite low expectations, the game succeeded, establishing her reputation. She later became art director for the sequel but stepped down after her strict perfectionism caused a new employee to quit within six months, returning to lead character designer for subsequent projects.

Her personality blends a laid-back, brutally honest exterior with deep professional dedication. She exhibits perfectionism, often rejecting drafts like Aoba's early character models. She copes with past workplace trauma through humor and a relaxed demeanor, a mechanism noted by Rin. Known for her sweet tooth and caffeine reliance, she frequently works overnight, sleeping at the office in minimal attire. She expresses embarrassment about her appearance despite others finding her attractive, favoring simple clothing like plain shirts and jeans over formal wear. Socially dense, she remains unaware of Rin's romantic feelings for much of their relationship [citation:].

Professionally, she mentors Aoba, assigning progressively complex tasks like NPC designs for "Fairies Story 3." She initially resists returning as art director due to past failure but accepts the role during "PECO" development after encouragement from Aoba and recognizing team needs. Later, she enters a character design competition for "PECO" but faces rejection as her submissions resemble previous "Fairies Story" work too closely. Aoba's unintentional submission wins, triggering Kō's emotional outburst at Aoba. After self-reflection and guidance from Rin about parallels to her own early career, she reconciles with Aoba and supports her promotion to character designer.

Following "PECO's" completion, she announces her departure from Eagle Jump to join Blue Rose, a French game company. In France, she collaborates with Catarine "Towa" Yamato and adjusts to new cultural challenges, including Towa's teasing and more assertive social norms. Despite initial struggles, she commits to professional growth abroad. Rin visits her in France, deepening their relationship. They eventually marry after Japan legalizes same-sex marriage, as confirmed in the manga's final volume.

Her key relationships include a complex mentorship with Aoba, balancing high expectations with pride in her protégé's growth. She publicly credits Aoba at events and ultimately cites Aoba's drive as inspiration for her career move. With Rin, their bond evolves from supportive friendship to marriage, Rin providing emotional stability and practical care during Kō's struggles. She also guides Hifumi Takimoto, recognizing her skills and recommending her as character team leader successor while offering ongoing support.