Uhmm, obviously! He didn’t let anyone know what was wrong with him even when he collapsed he kept saying he was fine!?!
No remember in the beginning, she asked to look at his body and she knew something was wrong with it, I think something was blocked?
Please read this in like a gentle tone but everyone knows lol, it was implied, maybe among the nobles tho, not the commoners. Estrella knows about his condition. She found out from the past how he died and now, from some books or during her stalking phase and by seeing the past. Plus, they talked about it countless times, girl is smart not to fuc**** know at this point. Even the emperor knows since they always give the same ahh reason why a guardian di**. And some randos from the engagement party talking on that balcony that if they become concubines and Raven dies, they would get his wealth. Basically, the point is Raven doesn't even need to explain or let anyone know to, they already do lol and they could've done something right from the start.
The couple is cute and all but hello? She literally has done nothing since episode 1, she only healed his body once and saw he has issues and literally forgot about it? She doesn’t even protect him or do anything of importance. He shouldn’t need to have kept using his knight to sneak in and heal him… like huh? They made her the strongest to not even show her abilities is kinda crazy…