Rhinox

"A spark: when a spark goes online, there is great joy. When one is distinguished, the universe weeps."

~ Rhinox explaining the significance of the spark
Rhinox is a maximal and a soldier of the Beast Wars. He was one of few maximals that fought in the beast wars and survived. When arriving to prehistoric Earth, he took the form of a Rhinoceros. He loves nature and does not wish to fight but when threatened, he is prepared and can pack a punch. He is close friends with all of his maximal counterparts. Optimus Primal and Rattrap are his two best friends and he was more of a fatherly/uncle figure to Cheetor and Airazor. Even Dinobot and Megatron respected him. He appeared in all 52 episodes of the cartoon series Beast Wars and one of the few that did not upgrade to a transmetal.

In a series sequel/spinoff Beast Machines, the surving Maximals return to Cybertron to find it overrun by mindless drones of Megatron. Rhinox was captured by Megatron and turned into another mindless drone and given the form of a giant tank. When Optimus restored his memory, he became a rogue and plotted to overthrow both Optimus and Megatron. His plans got foiled and sacrificed himself to save Optimus and his spark joined the matrix.