Mirian Seu-Lang, also known as Agent Shark is one of the most talented spies known in S.H.I.E.L.D. Originally from Japan, Mirian learned martial arts at a young age, but fled her home from her abusive master. She was rescued by Natasha Romanoff in Hawaii, from a boat wreck. As she woke up in a hotel, she went full survival mode and attacked Black Widow, but got held down.
After getting to know each other, Natasha learned of her talent in martial arts and decided to recruit her to S.H.I.E.L.D. Armed with the Yaneva Staff, she became a most efficient agent and moved to Chicago personally to work with Agent Maria Hill. After a few lessons with the Black Widow, she was launched into Colombia to find an ancient weapon called La Tritodora, a dangerous spear infecting the person and killing them instantly.
She also went undercover to recruit Ivon, by joining his school and getting him fitted in. She assisted in uncover Ivon's enemies who tried to take over the city. Grover Industries, which were a group of attackers using Chitauri tech to oppress the city and take it over, was stopped by her, Ivon and S.H.I.E.L.D.
Agent of S.H.I.E.L.D.
Raid of Chicago's Mayor