Translation of "Sly" in Japanese

He is a sly fox.

彼は陰険なやつだ。

He appears sly on the surface.

彼は表面上は陰険そうに見える。

I don't like him because he is sly as a fox.

彼はとてもずる賢いので私は嫌いだ。

He has come to look like a sly-as-a-fox Premier who uses his position's powers to the fullest extent, to his own advantage.

最大限に首相という権力を利用し、自己の保身の為に利用するキツネのようにずる賢い首相に見えてくる。