残ざん忍にん性せいMeaningsNoun1. brutal (nature); brutality; blood lust; cruelty; ferocityKanji used残left behind忍ninja性nature (of a person)Composed of残ざん忍にんbrutal; cruel; merciless; ruthless; cold-bloodedNa-adjective性せいnature (of a person); sex; gender; sex (i.e. sexual attraction, activity, etc.); -ty; -ity; -ness; -cyNoun