"Absolutely out of the question, Lieutenant." ― Admiral Tucker[source]Tucker is a fleet Admiral within the Planetary Union.
After Ed Mercer and Kelly Grayson were kidnapped by the Calivon, Alara Kitan requested permission to enter Calivon space for a rescue mission. Tucker refused and ordered her to return the Orville to Earth while listing Mercer and Grayson as having fallen in duty.
Tucker is a strict, no-nonsense individual who prefers adherence to the rules. He can also be slightly stubborn.