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An Assassin-class servant from Fate/Grand Order first appearing in the Halloween Strike! event. Osakabe-Hime is a youkai that haunts the walls of Himeji Castle, and a friend of Tamamo no Mae and Kiyohime. While she uses a bat motif, Osakabe is actually a kitsune that attained human form (and also notes that it would be confusing if there were two kitsune Servants in the game). She is also a massive hikikomori, and has the ability to control the origami animals she creates.