Nightcrawler's Manga

Everybody loves Yvonne. Theodore, the first prince has a bad reputation cuz the new empress is power hungry and sends a ton pf assassins which he promptly kills. So the fl is friends with the second prince who is a soft boy, who falls for her ig. And then the fl saves the first prince in a non-specific manner, they bond, but ya know circumstances, so they have to seperate as the first prince promises to find her again. Meanwhile the fl's whole family is murdered for treason and she goes into hiding at house Alexander (?) And there the young earl falls in love with her, but due to family circumstances she is only allowed to hide there as a male apprentice knight enslaved to their adoptive daughter who wants to be empress. So the earl is just friends with her, but he also murders the empress who was apparently responsible for the murder of her family and also murders his own father ig. So they vibe there until the now emperor Theodore visits and he notices her, pretends not to recognise her at first, cuz there is a curse on her that if somebody says her true name then they die, but thats quickly taken care of, meanwile she becomes the emperors knight. All truth comes out, they are in love. But she still has to clear her family name before they can be oficially together. But oh no, the emperor gets amnesia, prolly due to the earl, who feels like the fl was stolen from under him. So now the emperor treats her poorly and thinks she is an imposter. Meanwhile the girlie she was enslaved to goes for a political marriage with the emperor now to just become head of house alexander ig, and he accepts, cuz she promises him to deliver the real Yvonne. Meanwhile the fl is sad, still working as his knight, trying to trigger his memory.

So the white haired FL is a fake saint that knows it and just wants to go into exile so that she isnt killed, because she is being blamed for a couple murders. But in order to get into the magic kingdom she wants, she needs to be free of all criminal charges, so she needs to investigate who the real culprit is. The culprit is the blonde guy - her fiance who is obsessed with her, but she refuses to believe it cuz he has golden retriever energy around her. Cuz its an isekai the FL knows who the next victims are and tries to protect them using the information guild head and her magic constellation powers, not to be confused with divine power that allows communication with monsters. The real saint apparently doesnt know the diffrence, and tries to deny being the saint, also bc she likes the FL. No homo, apparently - cuz theyre cousins or smth. Then there is the crown prince who claims to know who the culprit is, secretly wants to wed the FL, but has animosity with her, cuz the FL thinks he just wants to use her saint powers, but in reality he just wants to support her "ambition"(?) So he gives the FL an ultimatum - he will help clear her name, but she needs to break her engagement with the murder retriever. But also he is responsible for the real saint, so the turn tables when only the FL can convince the real saint of accepting herself as the real saint or smth. But she still wants to break off her engagement to not sully the murder retrievers name or smth. Also there is a redemprion ark for the cold grandfather, cuz suprise, bitch, - he cared for her all along.