Hindsight (2011)

Both Korean movies involve the main lead are skill fighter but wanting to leave the dark side. It shows soft and tough faces of a person. Good acting overall

Both have female heroine... In 26 years a female sniper try to revenge. Another movie I can suggest is Hindsight with the similar story line.

Both about female heroine , how is high-skilled sniper involved in a revenge process.
It is highly recommended