内 剛
内剛 Kanji
外柔内剛 Kanji
見た目には優しそうだけど、彼って皆から外柔内剛の結構なタフネゴシエータと言われているよ。 He seems like a softy on the surface. But at the core he's got an iron will that makes him an extremely tough negotiator.
内剛外柔 Kanji