I love how Edelgrid has everyone confused and questioning it, but Lucisev has exactly as much in-game support, but it just gets grandfathered in on principle. As it should, I love Lucisev.
Pyra and Nia you don’t see as much as Mythra and Nia. Also notable in that it is sorta canon depending on how you view the whole Rex-Pyra-Mythra-Nia poly thing.