So I'm still reading Mahoyaku, but I've been interested in Ensemble Stars for a while with some budding muses there (Hiiro, Mika, Nazuna, Arashi, and Hajime primarily, with a few others because there's too many good kids-)! But I'm also super interested in crosscanon with both your characters too- though, potentials for Leo come far easier, hehe.

I can offer Mafuyu, Shizuku and Saki from Project Sekai, Riddle Rosehearts- especially if you'd like to play around with Kalim, I know for myself he can be a bit tricky to get down perfectly- and tons more!