
Mari's original form is white hair with yellow eyes but people sees her as black hair with green eyes. Aisha's appearance is a symbol that she's a legitimate princess and that's why her siblings really adore her but with Mari being illegitimate, well nobody likes her and for the readers view, we're seeing their true appearance.

Here we go again, u just said it in the MANHWA it's like this remember it's adapted from a NOVEL where Alisa has silver hair & golden eyes & Marianne black hair & green eyes, she stole FL's appearance with a spell even FL didn't know, she's not even their half sibling at all her mom was pregnant BEFORE sleeping with the king she's a comonner
Am I crazy or they changed the story?
Wasn't Marianne's appearance originally black hair and green eyes? And that's why she changed her appearance with Aisha? Because she thought that she would be loved like Aisha if she had her appearance