how to unlock the silver saints?

[Galdred]

I have finished the Sanctuary Arc, but that only unlocked Ichi and Jabu for purchase (and unlocked the gold saints, of course).
I unlocked Aquila Marin by going through the training, but I have no idea about how to unlock the other ones.
How do I unlock Ophiuchus Shaina and Lyra Orphee?

[NeonDrare]

Complete History Mode,After Santuary is Asgard,Poseidon and Hades,Orphee is on Hades,I don't remember where I unlocked Shina becouse she appears on All.try getting S and complete the challengers to get skins too.

[Glorfindel]

Shina is on poseidon saga's ;) she fight VS poseidon

[Galdred]

Thank you.
I didn't remember her part there, but it was ages ago.
I suppose Orphee will be in Hades then :)