He cosplayed as Sephiroth at the comic convention.
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culture
萨菲罗斯 transliterates Sephiroth, the iconic one-winged angel villain of 《最终幻想7》 (Final Fantasy VII). 萨-菲-罗-斯 approximates Se-phi-ro-th, with the final "-th" rendered as 斯 (sī) since Mandarin lacks the English /θ/ sound.