Angrezi is a teacher at CLAMP Gakuen and one of the advisors of the CLAMP Gakuen Paranormal Research Association. He is a tall gentleman in a gray double-breasted suit and Oxford school tie. He has a close beard and heavily tanned skin.
It is known that he is from the Peshawar region of India of an alternate timeline, where the British Raj is the most powerful nation on Earth and the technology and culture is 20th century or earlier. He was a captain of the Peshawar Lancers. For more information see this wikipedia article.