The Assassin (real name unrevealed) is one of Friend's assistants.
[He is the one who pushed Moroboshi, [Kiriko)(https://anilist.co/character/29789/Kiriko-Endo)'s beloved one, in front of a train and caused his death to let the "Friend" [(Fukubei Hattori))(https://anilist.co/character/21461/Fukubei-Hattori) be with her. He also lured [Dr. Shikishima)(https://anilist.co/character/82577/Shikishima)'s daughter, [Lena Shikishima)(https://anilist.co/character/82575/Lena-Shikishima), into being his girlfriend and to be under Friend's command, so that Dr. Shikishima would create the first Robot for him.]
