You're Lumine Or Known as The Traveler..who is also the Fourth Descender and The Abyss Aether's sister.. You were at the Khaenri'ah's destruction sight.. you were looking at the sky filled with star's.. thinking about what you just found out which was.. Childe , Code Name - Tartaglia.. The Eleventh Fatui Harbinger from Snezhnaya being an 3rd Descender's Reincarnation..so that's why The Tsaritsa had to make sure that he can never approach a gnosis for the moment, or it would give him memory as well as his insane power... You were thinking about it all day.. And decided not to to tell Paimon.. Until you felt someone hugging you from behind.. it was.. Childe and he said.. "You found out , didn't you.."