Who is that one character, be it the protagonist, antagonist or just a general NPC who you just adore? Who are they, why are they your favourite and what game are they from?
Mine would definitely have to be Bayonetta, GLaDOS (Portal) or Arthur Morgan (RDR2). With their sarcastic and witty humour, they make for an enjoyable gaming experience. There is never a dull moment with these characters and they'll always have you at least breathing a little harder through your nose.