Wong is a Master of the Mystic Arts within Kamar-Taj.
Real Name: Wong
Portrayed by: Benedict Wong
1. Doctor Strange
When their former librarian was murdered by Kaecilius and the Zealots, Wong then became the highly protective keeper of all the ancient books when he met Doctor Strange, and assisted him in his studies.
As Kaecilius attempted to use his power to bring Dormammu to Earth, Wong and the other Masters used their power to eventually defeat him, at the cost of Ancient One's death. With the Kaecilius' conflict over, Wong then joined Doctor Strange in protecting the New York Sanctum.
2. Avengers: Infinity War
Wong stood with Strange and Iron Man when the Black Order had attacked the Earth in search of the Time Stone, holding them back until Wong was forced to remain behind to protect the Sanctum once Ebony Maw had managed to kidnap Strange.