Theories so far:
One theory, given to me by a person on my thread that i established to gather information is this:
They where out of the blue yes BUT seeing as the MMO is comming out sometime this year and if roumor has it no later the 21st September who's to say these things showing up isn't one HUGE lead in to the MMO. This could be a show case of things in the MMO and Gaia has had this plan for a while and been working on it or somthing along thoese lines anway
This was in reply to my saying that these creatures were out of the blue. What this Suggests to me is, These are creatures who are going to have more in depth stories in Battle, and so they're setting them up as chars. now, so they are familliar to us.
Theory two: This one i'm still working on. I think these creatures have only immerged now because of the gaians exitement about the olympics. The centaurs would assume it would be a perfect time, the fish would be in fairly high demand to feed all the athletes, so they'd make they're move then. The Kuro gang wouldn't have immerged yet because as they are the head of the underground, they wouldn't want to be widely known wold they? I don't think it's just because of a favor. If they help win the olympics, they become infamous, and gain more clients, although raising the stakes with the autorities. And Lastly the Angel Imp. I'm still working on why he appeared, but it may have something to do with Rina's innocence, and that's why he stayed around her and noone else.