The problem is, the Earth bound Team Seven gems are only two (and a half), and while there are the extended Team Seven gems that join them later, none of them really fit as a permafusion to me.
On Home world, though, whatever type of gems Kotetsu and Izumo are–they’d be a permafusion if they could be (maybe the Home world culture is different regarding non-matching fusions, or maybe Kotetsu and Izumo are the same gem type…)
@kuipernebula: As a random suggestion (I haven’t followed this AU though, so sorry if this is covered) but Sakura could be a permafusion, with pre-time-skip!Sakura and Inner!Sakura as her two component gems.
Ooh! Good point, kuiper… I do have Sakura as a gem (instead of human like most of the Konoha Twelve), more specifically Morganite (because it’s light pink and is connected with healing and such) but maybe instead Sakura is a permafusion Beryl and her two component gems are Morganite and one of the other Beryl types (I’m thinking Bixbite, Heliodor, or Aquamarine)?