Sentinel Primal in Both Modes. Sentinel Primal is a Maximal teacher of Optimus Primal. It is unrelated to his animated characters. His beast mode is a Tick. Retrieved from "https://beastwarstransformers.fandom.com/wiki/Sentinel_Primal?oldid=14050" Categories: Maximals Beast Wars Maximals Beast Wars E.N.D.A.N.G.E.R.E.D. Maximals Beast Warriors Insect Community content is available under CC-BY-SA unless otherwise noted.