so this is either a spoiler or i made it up i dont remember
Spoiler!
OKAY so basically the yandere is the old lucia's soul and the convos the current one has with her are all just in her head 😭
yandere lucia comes alive only during when reincarnated is sleeping. she sends those letters to her majesty talking about prince's infediltiy and shii. yandere wants reincarnated to fall into despair and rely only on her lol
gay mf