Kyle Katayanagi is a character in the anime Scott Pilgrim Takes Off. He is one of the Katayanagi twins, and he serves as the fifth evil ex-boyfriend of Ramona Flowers. He is identical in appearance to his twin brother Ken, with both having Japanese heritage, black eyes, and short orange hair. The twins are expert roboticists, a skill that defines their approach to combat and confrontation.

In the narrative of Scott Pilgrim Takes Off, Kyle and Ken are members of the League of Evil Exes, the group organized to prevent Scott Pilgrim from dating Ramona. As the fifth ex, Kyle is encountered alongside his brother, and they function as a coordinated duo. Their shared background includes dating Ramona during her college years, though the specifics of that relationship are largely unexplored beyond the fact that they were both involved with her concurrently and later aligned with the League. The twins' presence in the story revolves around their technological prowess, which they use to summon and pilot large robotic constructs to fight Scott. Their role in the anime's alternate timeline adjusts when Scott disappears early in the series; the twins, like other exes, find their lives redirected. In one possible future depicted in the show, an older version of Kyle and Ken are shown to have formed a band called Pop'n TwinBee with an older Scott Pilgrim, indicating a significant shift from antagonism to a more collaborative relationship.

Kyle's key relationship is with his twin brother Ken. They are inseparable, communicating and acting in unison, and their effectiveness relies on their ability to operate as a single unit. Their relationship with Ramona is rooted in a past romantic entanglement that ended poorly, which fuels their involvement in the League. With Scott, the dynamic is initially adversarial, but the future timeline suggests that reconciliation and even friendship are possible long-term outcomes. The development of Kyle as a character is mostly conveyed through the twins' collective arc: they move from being high-tech obstacles for Scott to, in a divergent future, his bandmates, hinting at a capacity for change beyond their initial villainous presentation.

Notable abilities for Kyle Katayanagi are tied entirely to robotics. He and Ken design, build, and command sophisticated robots in battle, weaponizing their advanced technical knowledge. Their fighting style is entirely mechanical, relying on remote-controlled or piloted machines rather than hand-to-hand combat or supernatural powers. This makes them a distinct threat within the League and showcases a unique skill set compared to the other evil exes.