There's only one "Talia isn't real" hc/theory I ever might believe:
Talia is a personification of Ukraine itself. And her relationship with Misha as a manifestation of refugee/forced immigrant being homesick. There's almost no evidence to support it, besides this is exactly how I felt when I was forced to flee and live abroad for 4 months.
This headcanon is bonkers, but so is "Talia is actually Noel" theory if we're all being honest. I just prefer my bonkers to be poetic



















