permanently ?? You can always switch between human and animal forms unless it's part of some story narrative . Normally I'll chose human form but you do the animal versions so well I don't mind if you decide to stay that way .
It is a nice idea to play with, and Yin His made a very nice transition to human. On the other hand, the human version of Sonny is rather "blah" - it doesn't add anything to her character, and she looks so much like Sandybell that you could easily confuse the two together.
I have tried once or twice to "convert" some of my furry characters into humans - it worked in two cases, but has failed in all others. My recommendation is to leave your Anabantha girls just as they are, and then to create a new and unique set of human characters. You have a few such characters in your Jab Archives gallery, and I would enjoy seeing more. I understand that this means creating a new history and setting for the characters, but in the end it is worth it. Plus, you can always have your own characters "cross over" and meet every so often.
Well, Sonny as a human would be wonderful to see every once in awhile. I mean, the MLP girls are popular as both human and as anthros. Don't make the change permanent, but a once in awhile character would be sweet!
As always, VERY hopeful for Coqueta and Geox Girl!