Zeta Prime

Sentinel Minor/Prime/Magnus

Sentinel Minor, before his days as a Prime
Autobot
Information
Sub-group	Deluxe Vehicles, Elite Guard
Function	Autobot Elite Guard Captain
Rank	9 (Takara)
Motto	"Without law, all is chaos."
Alternate modes	Cybertronian Truck, Snowplow Truck
Series	Transformers Animated
English voice actor	Townsend Coleman
Japanese voice actor	Junichi Suwabe

Sentinel Prime

Sentinel Prime in Transformers: Dark of the Moon
Autobot, later Decepticon
Information
Sub-group	Prime, Leader
Function	Former Leader of the Autobots, Rogue Autobot, Decepticon, Traitor
Rank	10
Partner	Optimus Prime (Successor), Megatron (Betrayer)
Motto	"Freedom without survival is a tragedy, survival without freedom is a curse." "The needs of the many outweigh the needs of the few."
Alternate modes	Rosenbauer Panther fire engine Cybertronian fire engine
Series	Transformers Cinematic Universe
English voice actor	Leonard Nimoy

Sentinel Prime is the name of several fictional characters in the various Transformers series. First mention of Sentinel Prime was in issue #65 of the US Marvel Comics Transformers series, where he was mentioned to hold the Autobot Matrix of Leadership before Optimus Prime. Sentinel Prime is One of the members of the Dynasty of Primes and dedicated as the leader of the Autobots and has since appeared in a variety of forms as either Optimus Prime's mentor or friend. Fun Publications has also had a character in their comic called Sentinel Major, who is based on the Transformers Animated version of Sentinel Prime. He is also the main antagonist in the film Transformers: Dark of the Moon, where he betrays the Autobots and later Megatron for his own personal interests. His original Generation 1 incarnation was later reimagined by IDW Publishing as a similar fallen figure, perhaps in lieu of his movie counterpart.

Sentinel Prime (sometimes formerly called Sentinel Major and Infinitus) is an Autobot leader from the Generation 1 continuity family. Sentinel Prime is an imposing figure, standing head and shoulders over the average Autobot. Bristling with some of the most heavy-duty weapons and armor available to the Autobot army has instilled in Sentinel Prime a supreme confidence in his own abilities as both a leader and a fighter. Unfortunately such pride usually precedes a fall, and there will always be someone out there keen to prove a point, or who merely sees Sentinel Prime as an obstacle on the path to a bigger destiny. Sentinel Prime is often portrayed as Optimus Prime's immediate predecessor as Autobot leader.

Sentinel Major was originally one of the Quintessons' slave robots on Cybertron around twelve million years ago. Unusual among his consumer goods brethren, Sentinel Major was equipped for combat and was forced to participate in gladiatorial games for the Quintessons' amusement, wielding a spiked ball-and-chain weapon and a tire-shaped shield. He was once defeated in battle by Prima, who attacked their Quintesson masters when their match was over, only to be destroyed himself.