A guess, not a spoiler:
those pills could be just some shady drugs, maybe the original Aisha was fed them to keep her alive until she became a sacrifice for the 'saintess' or they could also have been used as a way to store some kind of power in that jewel in her wrist (I think it's called nexus in this chapter) and eating away at her since childhood so that she could be sacrificed and the jewel could be taken out and given to that 'saintess' or whatever she is the supposed FL of the novel world.
Or maybe it's just me from reading the first few chapters of 'Monster Duchess and Contract Princess' and seeing children being raised as sacrifices.