Sentinel Prime is a polished, stuck-up, overconfident bot who goes on power trips more than he consumes energon. He is highly charismatic and a great liar. 

His secret deceit is kept under tight wraps. Anyone who deviates from the status quo or threatens to expose the truth “mysteriously” disappears.

Some bots who are closer to him find the bot obnoxious due to his occasional ostentatious and unprofessional behavior due to his hubris.