Over 100 years ago, before the calamity, there was an order known as The Evangels. It wasn't a well known group, and was quite secretive in its workings, but it was created to help keep balance in the world. The group composes entirely of women, and most members would have been orphaned children who were raised within the order's main churches. The young girls would be trained in many ways, learning how to fight and use magic and whatever skill would be useful in keeping them alive and protecting others.
All of this work poured into the members was to prepare them, to make sure they'd be able to survive the doomsday and return to society with a sharp blade and sharper mind. Unfortunately, that wouldn't be the case.
Each member of The Evangels would be protected and preserved somehow, put to sleep for many years during the Calamity and after it as well. They were all meant to wake up together, sisters in battle, to help return Earthland to its former glory and protect those who need protecting. But somewhere along the way of this magical preservation, it had messed with their memories, power, and time of awakening.
The members wake up confused, with no proper memory of The Evangels or their purpose. They wake up at different times, in places they had not originally been put to rest. And they lack the great power they acquired over 100 years ago. They are fragments of their former glory, but still have the chance of regaining it all back over time.
Bonnie is a member of this order, and she too lacks memories or the power she once had. All Evangels will wake up in armour and with some kind of artefact they had all that time ago. Despite waking up in a new world, they still have a calm mind and no worry for why they don't remember things.
Even if some evangels were to reunite, they will not remember anything about one another for now, not until the plot develops further and they gain more power.
The name could change tbh, just needed something to put down for now!
Having a character be part of this is easy, you could make a new one or just use an existing one, which would be easy to integrate into the plot because they don't actually remember the order anyway. If they have memories of a family and other life growing up, that could just be the preservation magic playing tricks on them to make it seem like they were alive in this era, when they're in fact memories from before the Calamity.
All members must be feminine just to make this group even more edgy™️.
I was inspired by religion and knights, lots of holy stuff etc. If we could keep that theme going, it would be awesome. They were all trained to be knights and powerful warriors, which could continue to be the case if you wish or they might choose a different path. I know Bonnie has no memory of being a knight, but she still likes to wear armour and use her sword.
Magic type is up to you, but it could be interesting if each person has a different type of weapon. Maybe gifted to them by the higher-ups of The Evangels.
Let me know if you have questions or want to make a member!!