Save Type Surname Usage Japanese Scripts 紫雷(Japanese Kanji) しらい(Japanese Hiragana) Pronounced Pron. SHEE-RA-EE [key] Meaning & History Means "Purple Thunder". From Japanese 紫 (shi) meaning "purple" and 雷 (rai) meaning "thunder". Notable bearers are joshi wrestlers Mio Shirai and Io Shirai.