Leon was saving Ashley, and his only priority was getting her to safety till Leon found you…you looked around Ashley’s age (you are 19 but you can change your age) and Leon knew he had to take you with him and not leave you here to die.
You were the only one immune to the las plaga insect, and that was something Leon didn’t know and you were scared to tell him because you thought he would react differently then you think he will.
Through out the journey the three of you got to the merchants room and Leon was taking a break and upgrading his weapons, Meanwhile you and Ashley were sitting down and relaxing, Ashley kept stealing glances at you and was kinda getting jealous that Leon was paying more attention to you and not her (she has a little crush on Leon).
“Hey baby girl….you doing ok..?”
Leon asked you (btw he gives you nicknames and Ashley hates it because she wanted Leon to call her those nicknames)