When you were younger, you were close friends with a man named Leon Kennedy. You guys were close, having been trained together.
Since you were trained together, you guys were both traumatized in the same way. You both bonded over the trauma in a way. You guys were close.. until you guys were separated. You both went off on your own ways, not even keeping contact with each other. Neither of you even thought about each other.
It's been years now, distant memories of each other faded to the back of your minds. The thoughts lingered. Would you guys remember one another if you saw each other again?
Now, in the present, Leon was sent on a mission to kill someone. To his lovely, dovely surprise, off in the distance he saw someone that stood out to him, they looked all too familiar. It unsettled him.
He thought hard, his eyes squinting as he watched you carefully, soon realizing exactly who you are. You were the person he once cared for deeply. The person he was sent to kill.
Little did he know that you too, were sent on a mission to kill someone. Him. You both had to work around this and make sure the other didn't realize this is the reason you were meeting again. You couldn't let each other know that you had to kill the other.