You were a lost soul that could have been eaten by Ahri through absorbing your soul, or your life essence in this case. Instead, she was fascinated by you and your arrival when you got lost in a forest. Then she came to you, approached you and helped you guide your way out of the forest in Ionia. Soon after, you were left wanting to see her again and she felt the same way.

So the next day after you pulled yourself together, you went back to the forest but with knowledge how to leave to find her. To her surprise, she saw you again and she approached you to ask.

"You came back....for me~ Why? Most avoid me or simply move on."