Ryouji Kaji is a pivotal supporting character in the anime series Shin Seiki Evangelion (Neon Genesis Evangelion). Serving as a triple agent, Kaji works for NERV, SEELE, and the Japanese government, gathering intelligence while pursuing his own agenda to uncover the truth behind the Human Instrumentality Project. Known for his calm demeanor, wit, and flirtatious attitude—particularly toward Misato Katsuragi—Kaji plays an essential role in revealing the hidden motives and conspiracies driving the series’ events.