Wait, are you asking about the story WITHIN 'Argent' or the literal narrative called 'The Argent Story'? I've only read the web serial 'Argent' by D.D. Webb on RRL, so that's the one I know. The protagonist there is a guy named Jonathan Trent, but everyone just calls him Jon. He starts off as this kind of washed-up, cynical wizard who failed out of the fancy magical university and is basically doing grunt work for the Adventurer's Guild when we meet him. He's not your typical hero at all—more sarcastic and world-weary, but you slowly see his competence and weirdly specific knowledge come into play.
His companion, a fairy named Sheyann who's bound to his service, is almost a co-protagonist in the early parts. Their dynamic is the heart of it, with her being ancient, powerful, and deeply snarky, while Jon is the mortal trying to navigate a world full of much stronger beings. The story really follows Jon's perspective as he gets dragged into bigger political and magical conflicts, often because he's the only one who can see the arcane mechanics behind things. So yeah, Jon Trent for sure.
I will say, the title 'Argent' refers to the silver magic he eventually learns, which is this rare, pure form of arcane energy. So the 'protagonist' is also tied to him becoming an Argent, a practitioner of that magic. It's a slow build to that point, though. The story spends a lot of time on his growth from a disgraced dropout to someone wielding real power responsibly, which I found way more satisfying than if he'd just been a chosen one from page one.