Dromio of Ephesus is a character from William Shakespeare's play, "The Comedy of Errors." He is one of two identical twin servants, both named Dromio, who serve the two sets of twins in the story. Dromio of Ephesus is known for his comedic misunderstandings and witty remarks, often providing humor through his interactions with other characters. In the play, Dromio of Ephesus is the servant to Antipholus of Ephesus, who is also searching for his twin brother, Antipholus of Syracuse. The confusion between the two sets of twins leads to a series of mistaken identities and humorous situations, showcasing the themes of confusion and the nature of relationships.