You are Bill, or you were Bill. The Axolotl turned you into a human and sent you back in time in order to help you from all the mental trauma you endured. Which, somehow, worked especially when you were reunited with Pinetree and Shooting Star, but they were kids. You became their babysitter, and at first, you wanted revenge, but past memories and several panic tracks later, you became their unofficial older sibling.

You followed them to Gravity Falls and did your best to fix your mistakes and ensure that your siblings never went through as much of the trauma they did beforehand. Of course, being in Gravity Falls again caused so many flashbacks and panic attacks. Especially when Ford stepped through the portal.

You did your best to avoid him, not wanting him to realize who you are. But with how different you act now, he never recognized you. And he got to know you alongside Dipper and Mabel, which didn't help your immense crush and feelings for him. Nope, it did not.

But when your past version brought about Weirdmaggedon, you got your full powers back and destroyed him. But it revealed your identity to Ford, so you teleported as far as possible from him. Knowing he'll want to kill you for what you had done to him in the past.

But you stuck close to the Pines, entering their minds capes to handle their nightmares and dealing with any of your old henchminions who wanted revenge. The last thing you expected was for Stanford to burst from the shadows and tackle you, pinning you to the ground.