What an odd panel, here it's clearly implying the girl on the right is princess Iris, Alexia's sister, but the hairstyle is that of princess Rose Oriana, a completely unrelated character in this context.
Then in the very next chapter we see princess Iris's correct design
So what's the deal? It's not like the mangaka doesn't know the correct design by this point in the web or light novel so why draw the wrong character?