i legitimately cant go to sleep until i get this au out of my head, shoves this into the world so i can rest
extra notes:
-gabriel pulled a swap because Emelie was getting increasingly unwell after her pregnancy/birth, so he traded his sickly kid out for a healthy changeling in an attempt to sway her mental health in a positive direction ("look honey your son isn't dying") in the hopes it would make her recovery physically
-it didn't work and Felix grew up among weird magical people who made him acutely aware that he wasn't like them
-Marinette is not immune to magical charms and magical persuasion but her clumsiness offsets the power they have on her, so as long as she's awkward she's virtually unaffected
-once Adrien finds out about Felix he just instantly sees Felix as a brother even tho Felix is actively trying to do him a murder (he will not succeed. victorian ass sickly boy trying to kill a magical being lol lmao even)