Tbh I think if you transmigrated into someone like Eris your servants would notice something was up waaaaaaaay before your actual parents.
Like compared to a family where you see each other every day aristocratic parents would see you a lot less and a personal servant would see you as much or more.
Also I think if you were someone's personal maid servant or valet or whatever you'd optimize your work a lot based on your employer's idiosyncrasies. They drink X tea most of the time so you keep a ton of it in stock. They're usually out of the house at this time so that's when you clean this or that part of their room. They always say they don't want dessert but then change their mind so you have some prepared anyway.
Would be super noticable if all of those things suddenly stopped working.