Cepheus

Ah lol. Yeah she is super cute in her tournament match.

Wait you have gotten that far already? Then why so mad about the whole summoning method thingy? The truth behind that should have already been revealed by that point...

should it??

if so I might have either skipped an episode, or didn't pay attention when it happened...

the only thing about the summoning methods that was mentioned was that they have special courses at LDS, and that Shun and Yuto are battling against Leo who apparently uses Fusion-summons

Ah yes, my bad, you are still a couple of episodes away from the big reveal... But you are almost there, keep watching.