Which Era do U think would be best for THE KAPPA???

So I have been thinking about this for a while and still can’t think of a good time zone for my oc; THE KAPPA. So I decided to leave that up to u. So here is a poll for u fellows fans to help me decide which time zone The Kappa would fit best in; AVATAR LAST AIRBENDER TIMELINE OR LEGEND OF KORRA TIMELINE???