Theris is charismatic corruption in polished form, a man who turns charm, ambition, and performance into tools of control.
He understands pleasure, status, and the theater of public life, making him dangerous in a very social, very believable way. Theris does not need ideological depth to do damage; he knows how to make vice look glamorous and self-interest sound practical.
That familiarity is part of his power. He feels less like a monster from legend than like the smiling face that teaches a city to excuse rot. He thrives wherever vanity, appetite, and public performance gather around power, which is part of what makes him feel so plausible. He gives corruption a social brightness that can look appealing before its cost becomes clear.