Doctor Helen Cho is a character from 2015 film "Avengers: Age Of Ultron". She is a Korean geneticist, and an ally of the Avengers. She was present at Stark Tower when the group returned from a successful mission, and put her medical expertise cellular regeneration to use patching a wound sustained by Clint Barton during the their campaign. She then grudgingly accepted an invitation to the Avengers' victory party when she learned that Thor was going to be there. She is portrayed by Claudia Kim.