The Flashback

For a while, I thought that there was only one child in the flashback, but now I see that there are two: Queen Kate's child and Biebke's child (Ryuu/Alexander). They were drawn similarly (that and I wasn't really paying much attention because I was more focused on Daniel's part) and the two weren't shown a lot. Queen Kate's child is a bit older and calls Daniel "Doudou." Biebke's child, Ryuu, is younger and doesn't really speak much (we can see that when he's playing with his mother's glasses + extra chapter in which he can't speak properly). But the main difference (for me) is their hair: Queen Kate's child's hair is straight and flat while Ryuu's hair is sticking up.

Queen Kate was playing with Ryuu, not her child, when Biebke arrived. I think Queen Kate's son is dead because of her horrified face and because of Simon's line, "You are the terrorist who slaughtered the king and his son."

Biebke and Daniel only met twice according to Daniel. I think she's the one who threw Ryuu to Daniel, but they probably couldn't really see each other because of their surroundings and chaos (you don't think straight when you're panicking). Plus it doesn't seem like Biebke was wearing her glasses at the moment. I don't think Daniel would have recognized right away because of his little interaction with her.