Is the mythological character Aeneas real?

No,as he is a mythological figure.

---- Alternate Viewpoint

Wyatt Earp was true in the sense that he was a real person - but most of the stories told about Wyatt Earp never happened. When someone becomes famous in a society where there are no real checks on what is true and what is just a good story, good stories get stuck to the famous person.

We don't know if Aeneas was among the actual defenders of Troy or not, but we do know that most of the stories told about him were made up by people hundreds of years after his time.

So perhaps Aeneas is true, but the stories about him are mainly untrue. Or perhaps even Aeneas is untrue. In practice there is no real difference.