Strange can't help but frown a little as he thinks. That is definitely a personal thing that he didn't expect Billie to share. And it's also something that Strange himself still has trouble grasping. After all, he's been trying to push past Arabella and trying to push past his old mistakes, but they still linger on his mind.

No matter what, hearing Billie out might be good.

"Any tips on how to stop letting it haunt you?"