Leo Kliesen (Japanese: レオ・クリーゼン, Hepburn: Reo Kurīzen) is a character from the Tekken fighting game franchise by Bandai Namco Entertainment. First appearing in Tekken 6, they fight using Bajiquan, and have since appeared in every subsequent title in the series as well as the related manga, Tekken Comic. A young German child of a spelunker father and a corporate executive mother, they seek to solve their mother's murder. Created by series producer Katsuhiro Harada, Leo's gender is officially unknown, and the character was intended to appeal to both male and female audiences. Harada has said that Leo is not non-binary, stating that the character "would not want to be categorized as such." Originally voiced by Veronica Taylor, in later installments they were voiced in German by Philipp Zieschang.
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