Sentinel Major

The name or term "Sentinel" refers to more than one character or idea. For a list of other meanings, see Sentinel (disambiguation).

Sentinel Major is an Autobot from the "Wings of Honor" portion of the Generation 1 continuity family.

Sentinel Major is the Field Commander for the Autobot Elite Guard, as well as serving as Magnum's right-hand aide and bodyguard.

Fiction

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When Magnum left his office to greet Metalhawk's squad upon their arrival at Elite Guard HQ, Sentinel Major tagged along and helped to make sure Magnum's orders were perfectly clear. The Coming Storm: Part 2 Flames of Yesterday A Team Effort The Coming Storm: Part 5

His appearance—and placement as Magnum's right-hand bot—is pretty obviously an homage to Animated Sentinel Prime. (So far his personality is a bit less jerkish, though.)
But whether he's technically an incarnation of Generation 1 Sentinel Prime is a matter of some debate.