Who plays slightly in Peter Pan?

There is no character named "Slightly" in the story of Peter Pan. Perhaps you're thinking of "Slightly", one of the Lost Boys in the story. He is known for being slightly (pun intended) more refined than the other Lost Boys.

If you're asking about a specific production of Peter Pan, you'll need to provide more details, such as:

* What year was the production?

* Which stage or screen adaptation are you referring to? (e.g., Broadway, film, etc.)

Once you provide those details, I can help you find the actor who played Slightly.