mephistophelian, diabolical, naughty, impish, devilish, blackguardly, rascally, dishonest, mephistophelean, arch, dishonorable, scoundrelly, diabolic, jaunty, playful.
The hidden face of the young lady lit up with some roguish
I was a little roguish
child, but he was the youngest and merriest person in the room when he was amused."
There was the faintest tinge of brown in her plump cheeks, and a roguish
smile in the corner of her eyes that made it a hardship not to take her up in one's lap and hug her at sight.