@homeworkChan
To be fair, the silver guy seem to know the most about her. The rest of them looks at her and her personality but in previous chapters he was the only one that could tell more about her.
@Jedendvatri I wouldnt say that, there are many people that dont talk about their past and it is understandable, especially as a commoner-knight who interacts with high ranking nobles, there would be a connection in war on the battlefield etc, but as a commoner she may have avoided talking about her background and stuff, since its something hard to grasp for nobles anyway.
So they can know her as she is, because they fought together and spent much time together, falling in love, while not knowing anything about her background and past at the same time.