Bilar

From Memory Alpha, the free Star Trek reference.

Bilar was an inhabitant of Beta III in 2267. He was the first Betan to address the second landing party, and he appeared to be a simpleton, until the landing party learned more about the nature of the civilization of Beta III. When the red hour struck, signalling the beginning of the Festival, Bilar's inhibitions disappeared completely, and he seized Reger's daughter Tula, assaulting and possibly raping her. (TOS: "The Return of the Archons")

Bilar was played by Lev Mailer (credited as Ralph Maurer).