I need an adjective that implies that the person is profound/thought-provoking but not in a serious way, sort of like the narrator in The Hitchhiker's Guide to the Galaxy.
The words I've found (insightful, provocative, etc.) suggest that the speaker isn't humorous, which is very important. For example, 'Sally is a [word] young woman with a lot of good ideas.'
The word should probably be a little more academic and less conversational.
The first few adjectives to enter my mind, as I understand your request, which mean cleverly humorous, are scintillating, droll, or witty, depending on the desired tone. The Cambridge English Dictionary definitions of each are as follows:
Scintillating - funny, exciting, and clever
Witty - using words in a clever and funny way
Droll - amusing in an unusual way
From these choices, I would like to emphasize scintillating, but the matter is absolutely a question of tone and desired effect.
