whimsical

“But perhaps he may be a little whimsical in his civilities,” replied her uncle.

Sherlock Holmes was leaning back in his chair after his whimsical protest, and was unfolding his morning paper in a leisurely fashion, when our attention was arrested by a tremendous ring at the bell, followed immediately by a hollow drumming sound, as if someone were beating on the outer door with his fist.

Life is full of whimsical happenings, Watson."

"Ah, that's a long story—rather a whimsical one, too.