I don't think it's demon in the literal sense, more that the religion of the region sees the dark night people as being a threat and therefore they are "demons". She was clearly heavily brainwashed by the religion that sees the dark night people as heretics to be destroyed, so she wants her mother destroyed at all cost, and her father protecting her mother and punishing her for hating her made her hate him too. I think in her mind she sees them both as legitimately demons and is terrified of them.
Plus people think her mother brainwashed her dad that's why she believes her dad is being used
I think both of her parents are demons at this point lol
I know a ship spoiler but no detailed explanation
Ship is extra
Wow if the og illiana is act a good person then is shes doing all of things just so she can kill her whole family? Also when she said her mom is a demon does it mean shes half human half demon? If so then that would be a good plot twist! Idk why but i love how religious she is such a nice contrast with the whole demon stuff