If only they'd just named her Anarchy - even though that puts too fine a point on it to be namey; it's only droll. Annachi is not only droll but kinda lame. Ryot is lame too. But in theory, it's a radical sibset. Literally. I like it. If you're going to go crazy with names, may as well go. It puts a different spin on Rebel ... In the US I usually think of Rebel as a name given to allude to the Confederacy. I heard of an accountant in Texas named Rebel Quillin, and that is one of the top 5 coolest fn/sn combos I've ever seen in my life.
I'd have wanted those siblings to be named Liberty, Rebel, Defiance, and uh ... hmmm, Striker? instead. lol