About arlecchino

So I was going through khaenriah lore, and found arlecchino ordeal a bit odd.

How is she a pure blooded khaenrian after 500. According to the nk archon quest, we know that tholindis snuck away a piece of the moon and gave it to frithr, who are that time was escaping from there, and we were told that arlecchino inherited the moon fragment from there.

However, frithr was not a pure blooded khaenrian, so how did arlecchino, being born in present day gain the cross eyes and blood fire? Especially since they were the people king irmin eradicated first?

In addition to that, arle grew up in the orphanage, so how come the moon fragment came to be with her?

We know that abandonment is not likely cuz why tf would her parents leave her with the moon fragment? Any ideas on what may have happened in those 500 years?