There are 2 poly routes atm, ie: Alethea/Mira/MC and Eliseo/The Knight/MC. For the Alethea/Mira/MC dynamic specifically, it would be a throuple sort of dynamic, while for the other poly option it would be more of a they are just both into MC yet are not romantically into each other; however, they maintain a healthy bond between each other. This could change; I am thinking about making it a choice to have the other poly route optional on whether it's like what I stated or more of a throuple dynamic, but as of right now I am writing it so it is not a throuple dynamic. Thank you for the question, though!