Agent Kwan Chen is a secondary character appearing only in the Agents of S.H.I.E.L.D. episode "Girl in the Flowered Dress" and is portrayed by Tzi Ma. He is an agent for the Hong Kong branch of S.H.I.E.L.D.
He was tasked with keeping tabs on Chan Ho Yin who possesses pyrokinetic powers. When Chan is kidnapped, Kwan, Coulson, and May infiltrate the lab Chan is in but because Chan is under Extremis' effects he kills Kwan with a fireball through the chest.