noun
antihero; dark hero
A protagonist who lacks conventional heroic qualities, often morally ambiguous or flawed. Wasei-eigo from English 'dark hero', but the Japanese usage aligns closely with the English concept of an antihero.
wasei-eigo (Japanese-coined English), from dark hero
彼はダークヒーロー的な役を演じることが多い。
He often plays antihero-type roles.
この漫画の主人公は、正義のためなら手段を選ばないダークヒーローだ。
The protagonist of this manga is a dark hero who will do anything for justice.