Save Gender Feminine Usage Popular Culture Scripts 烈子(Japanese Kanji) Pronounced Pron. REH-TSOO-KO [key] Meaning & History From Japanese 烈 (retsu) meaning "fury, rage, violent, vehement" combined with 子 (ko) meaning "child." This is the name of the protagonist of the 2016 Sanrio anime 'Aggressive Retsuko'.