Actually, let's retcon this since it provides you more chance for CR.

With Maya's help, you rolled a 15 to shake the possession attempt long enough to reason with it. You promise to avenge its death, and it seems to trust you for the time being. Maya is able to contain the spirit long enough for it leave your body.

But as it does, in your head, you'll hear one name, and one name only.

"Rockseeker."