Things are about to get a little dark now
I'm going to make a list and put it in the first note of the story with all Narcissa's interaction with Cassi. I'd like to inform you that their relationship will take off strongly from the 5th year and there's where the story changes.
Andromeda's first appearance is also in the 5th year, just like Bellatrix.
I'm building a slow narrative, but I swear it will make sense.
Andromeda list:
Andromeda
Promises Promises
Black Sisters
The Seven Potters
Ceremony
The Savior Princess
If Cassiopeia were a trend, it would be from Taylor Swift to Lana Del Rey, and I hope the reason for the gradual change becomes clear.
Bellatrix list:
Phofecy
Trapped
Unbreakable Vow
Black Sisters
Cissa
I have no choice
Death Eater
Bella
Devastating Shadow
Andromeda is scared
All her emotions fell like explosions when they are around
Narcissa doesn't shy away from her feelings.
At Least As Deep As The Pacific Ocean
Bellatrix is crazy.
I hate you. But we could be together if you wanted to
Cassiopeia will gradually fall in love with all of them, and despite the Black sisters doing so first, she fall harder.