Thank you for playing the game that far, but the content is only available for 3 characters in this version (Rika, Hana, Lucie)
I'm focusing on 1 character at a time, about what you mentioned is for unlocking Marie(Mage) that will require 2 Referrals and Player Level 3 to unlock referrals are yet to be added, please look forward to further versions next I'm planning to work on Mio(Baker) Thanks for your patience.