Mangosuthu is the principal of United Nations International School. He is African and is shown as very sarcastic, insulting and acerbic often ending his remarks with a loud, bellowing laugh. He is known for making numerous yet ridiculous puns. in " A Day at the Races and a Night at the Opera", he comments on the track and field day as : "like the real UN, there was a lot of heated gibberish but nothing was accomplished, and we send the bill to Uncle Sam" Also in "From Chunk to Hunk", he makes a pun on a video of President Clinton falling through his floor :" I'm sure we all appreciate President Clinton's groundbreaking message."
He wears a green suit with a red tie. He is always happy and laughing.