Asval had an earlier debut in this series than in 2005.
In 2005 Asval was a descendant of the royal family of Sapiro. If I remember it properly he was not a prince until Etheria, so it was probably some retcon. I thought that this has changed, because he was not called "prince" by anyone early in the series. Not until Episode 21, when Axilom called him "Prinsipe Asval."
I'll still wait for him to say what his connection with the royal family has become now, before updating the family tree.