Hot Take

This random thought popped into my head the last time I played and Theseus called Dionysus during our battle. And it hasn't left.

But I don't think Theseus should be able to call Dionysus, or at least Dio shouldn't listen to him, and you get a free random easier Theseus battle sometimes.

In Greek mythology, when Theseus killed Asterius he did it with his (Asterius) sister the princess Ariadne's help and NEVER would have succeeded without her! She had fallen in love with Theseus and betrayed her father to help him and save his life. She left with him afterwards, under the belief that they would marry once in Athens, but he abandoned her on the island of Naxos during the journey.. where Dionysus found her! He fell in love with her and married her! I think Dio would HATE Theseus for what he did to Ariadne, especially after all she did for him. And therefore would never help him! Maybe he'd even attack Theseus for the nerve of it.

I also think Demeter should help him after you finish the story and she learns you're her grandson.. but that's much lesser.