The captain who leads the R'ongovian delegation in talks with the Federation at Starbase 1 in 2259, puzzling Starfleet's diplomats by constantly changing his manner.
Captain Vasso appears in the first-season Strange New Worlds episode Spock Amok. He speaks for the R'ongovian Protectorate, whose territory lies between the Federation, the Klingons and the Romulans and whose friendship Starfleet badly wants.
The negotiations go oddly. With the Tellarites the R'ongovians are quarrelsome, with the Vulcans coldly logical, and with Admiral April and Pike they shift again. Vasso asks to deal with Spock, who at that moment is T'Pring in Spock's body, and the session ends badly.
Pike grasps that the R'ongovians adopt the outlook of whoever faces them because they prize empathy above all. He therefore argues their side of the case, setting out every reason they might have to refuse the Federation. Vasso is satisfied, and his ship departs with a solar sail bearing the Federation emblem.