In Shrek, Thelonious has intelligence he is first seen when Farquaad wants to choose a princess he wants him to pick number 3 which he had two fingers and later at Fiona's wedding
In the short, he sings with Gingy.
In Shrek 4-D
He seems to be not as smart as the others of Farquaads men.
He wears a grey suit with a darker grey vest, gloves and shoes and a black hood with yellow eyes. His true face is never seen.