Serians that have Unknown Affinity/Parents are all 2nd Gen Serians (there is one exception, but that's just a tiny lore sidenote for Harmony) and they are Serians that were born to a non-Bonded Serian Circle (or whatever they call it in their Faction). The reason that they are Unknown is because the Serian's parentage is unknown even to the Serian itself (again, exception is Harmony). There are really only 2 reasons that most of them would not know their parents:
1) Their Circle was so close that the foal never knew who specifically its parents were because all of the adults took equal responsibility for raising it. There is a Faction of Serians that purposefully does this.
2) They were somehow removed from their parents at an age that they didn't know their parent's names (orphaned, abandoned, stolen, etc.)
Ummm... so without giving too much away, there are Affinities/Altars, and there are various Factions, and there are politics in both XD The Bonded Serians are kind of the hippy Faction, not the other way around >.> They're the nicer ones, the rest are way less gregarious and trusting, and Prophet used to be similar, until Phoenix got ahold of him. That's why he's still a bit of a loner and all of that, even though he sympathizes with the Bonded and acts as an ambassador
