Theotetus and the Stranger in the Dialogue

The main character, im often thought tob plato's mouthpiece in the dialogue, is a mystery guy. The two people who speak throughout the dialogue, for the most part, are the eleatic stranger and theotetus. So maybe it would even be fair to say that the point of the theory forms is just to claim that when you get hold of a definition of beautiful or beauty, that what you've got hold of is the cause of things being beautiful. Would that be a fair way to just summarize the terant of aberi esuran eor? Ok, i'll take thefo let's go along to the sophist. This is not a dialogue i haven't discussed