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 Scorch, who possesses pyrokinetic powers. When Scorch is kidnapped, Kwan, Coulson, and May infiltrate the lab Scorch is in but because Scorch is under Extremis' effects he kills Kwan with a fireball through the chest.