Yakra is a monster found in 600 A.D. in Chrono Trigger. He is the "boss" enemy the player must defeat to rescue Queen Leene in the Cathedral. He is also the ancestor of Yakra XIII.
Yakra kidnapped Queen Leene and impersonated the Chancellor. While on a mission to rescue the Queen, Crono, Lucca and Frog catch up with Yakra at the Cathedral. Yakra eventually is defeated.