What is ilean from regular show?

There is no character named "ilean" in Regular Show. It's possible you're misremembering the name, or maybe you're thinking of a character from a different show.

Could you perhaps provide more context or details about the character you're thinking of?

For example:

* What does the character look like?

* What is their role in the show?

* What episodes do they appear in?

With more information, I might be able to help you identify the character you're thinking of.