Ginji functions as an experienced, opportunistic presence within train settings. He first observes Katsuhiko committing acts of molestation without intervening, identifying Katsuhiko during these incidents. His silent presence generates tension before he departs. Days later, Ginji confronts Katsuhiko to stop another molestation attempt, asserting dominance over the space. Following Katsuhiko's removal, Ginji coordinates with associates to systematically target multiple women on trains, transitioning from passive observer to active perpetrator. He orchestrates challenges, manipulating circumstances to pressure others into pursuing high-profile targets such as a television anchorwoman while simultaneously plotting strategic betrayals. Ginji operates as an instigator who facilitates and engages in non-consensual acts alongside his group, maintaining a consistent antagonistic role across all media without development or redemption.