Theory on her celestial

Hear me out guys, I think her celestial is kiddo or at least a form of him. That’s why she’s drawn to him even from their first encounter(smells like her past lover, in different timeline). The way they both interact with her is also similar and their use of pet names.
When she got to see the future the girl said she showed her the past and the present. Meaning that vision of the timeline where she’s kiddos girl might have actually been from the past. The other people in that timeline seemed to fear kiddo and think he’s very devoted to her. Just like the celestial. In the end of that timeline she committed, which I think is why kiddo is now looking for her in the celestial form.
He’s also an outlier within the celestials and often interferes with the human realm. It could be due to him being a human before that somehow became a celestial.

The celestial also mentions that he searched far and wide for her, so that he they may reunite. This could be due to her ending her life at the end of that timeline. He's been searching for her ever since.