Kaworu Nagisa is an imaginary character in Neon Genesis Evangelion. He is sent to Nerv by Seele, in order to replace Asuka Langley Soryu, whose synchronization ratio has fallen too low for her to pilot the unit. Kaworu is both the Fifth Child and the 17th Angel. He and Shinji Ikari enjoy a brief friendship and love. When Kaworu betrays the organization, Shinji kills him. His last words are "Thank you. I'm glad I met you" (to Shinji), and in the aftermath, Shinji states that he loved him too, and that Kaworu should have been the one to live. In "The End of Evangelion" he appears first to weaken Unit 01's AT field, so that Instrumentality can commence, he and Rei help Shinji choose the decision to reject Instrumentality in favor of individual thought and suffering pain.