Outside her brother, her brother's boyfriend and that ninja maid, Anya is the only one who actually cares about Nunnally (even after no longer hosting her Mother's consciousness), being her personal knight and all. They're the same age, it's a Sunrise IP, and Code Geass ships are wild anyway, canonical, in fandom, and even as maritime vessels. I haven't touched the Series since Akito the Exiled (which is from 2012?!), so you can't prove me they're not a happy couple.