Who is Trymon from The Light Fantastic and what is their importance?

Trymon is the evil wizard who needs the spells in the Octavo to become the most powerful wizard in the world. Pratchett paints him as a clever man with a strong mind. When Luggage eats Galder, he takes over his position as the chief wizard and changes the Unseen University from a traditional institute to a more modern and business-like establishment. He knows by doing this, he can gain the power he needs to become the dictator of the Discworld. At the end, Trymon locks all the wizards who are against him in the lower cellar and goes up to the Art Tower to read the spells in the Octavo. Fortunately, Rincewind and Twoflower are on hand to destroy him.