High Councilor Tomaandi is a member of the Council of Autobot Elders in Iacon. He may also be a member of the royal family ruling Iacon.
He is a fool. (At least Xaaron thinks so.)
Tomaandi presided over the meeting of Autobot Elders where Optimus Prime agreed to lead the mission to clear a path through the asteroids. Despite his less-than-sunny opinion of the Council, Optimus Prime was noticeably deferential to Tomaandi, calling him Sire. Tomaandi was not named in this appearance and appears in different colors, but seems to be the same character.
Thousands of years later, facing bombardment, by the Decepticon Trannis, the Council decided to surrender. Trannis executed them all for their trouble.