Yep, it's official. No crossover characters allowed. Which means, it's only for original characters (and not their off-element variant).

Say, why don't we vote for Demeter and Pharol? Well, since new players are coming to the game thanks to coronachan and these two do NOT drop in any gacha, at all. And before you judge me, I know these two has kinda not-that-useful kit, but that will be a stepping stone for them.

(And Pharol was added for Dragon Providence crossover when the game wasn't even a year? then she gone, like poof sooo...)