rebellious individual; rebel
Refers to a person, especially a young one, who defies authority or social norms. Often used in literary or dramatic contexts.
彼は学校で反逆児として知られていた。
He was known as a rebel at school.
その小説の主人公は体制に挑む反逆児だ。
The protagonist of that novel is a rebellious individual who challenges the establishment.
Compound of 反逆 (rebellion) and 児 (child). The exact historical derivation is uncertain, but the word is conventionally used to describe a young rebel.