R. Yohanan's sister: The one who tried to keep them together
R. Yohanan persuaded Resh Lakish to learn Torah with him, by offering his sister as a wife saying that she was more beautiful than him. The two men later fell out in a bitter angry argument, and despite her pleading, they both died, unreconciled, leaving her grieving.
It is ambigious within the talmudic story what exactly attracted the two men together, they created a strong bond, and their relationship transformed each other. She, for a time, was the vessel holding them together. Cementing, and legitimising, their connection.
(Bava Metziah 84a)