Who is the Greek mythology figure that comments on love and the relationships between women and men in "The Wasteland" (section three)? Which part of his representation is significant? Why?

The figure from Ancient Greek mythology who makes an appearance in section three, "The Fire Sermon," of T.S. Eliot's The Wasteland is the prophet Tiresias, a character who appears in Homer's The Odyssey and several Greek dramas as well. Tiresias has both male and female features and, though he is blind, he has the ability to see into the future. Tiresias is the speaker of section three, which primarily focuses on sexual relationships between men and women, as well as homosexual relationships.
That Tiresias is the one commenting on love and relationships between men and women is particularly significant because of the prophet's ambiguous gender. The description of Tiresias in the poem combines traditionally male and female attributes:

I Tiresias, though blind, throbbing between two lives,
Old man with wrinkled female breasts, can see.

This description, along with Tiresias's ability to see the future, would seem to give the prophet the unique authority to comment on the experiences of both men and women.