My first thought was she got graped, me and my dirty mindwhen i saw her dead eyes and the whole "she isnt how she used to be" spiel i was afraid it was gonna be yet fmc that got drugged or controlled or lost her memories but im glad it was just her harbouring hate towards the mc (for now) and his family
Loyal might be an understatement,she's gonna go from tragic lil' sis to the big sis pushing down her now shota big brother.damn bro that maid is gonna be LOYAL to you when she finds out who you are. revenge fantasy is always so satisfying even if its a bit handwavy