As the children of the godson of the dark wizard Grindelwald, Flora Summers and Adelia Summers lived "carefully" in Hogwarts, for fear of being known by others.
The younger sister Adelia loves to cry but is obedient. She is a dwarf in words but a giant in actions. She screams fear and uses black magic. Flora, the elder sister, lives alone and looks down on everyone equally, except for being more patient when it comes to her own sister. Not only are their personalities very different, but they are also extremely extreme in the houses they were assigned to. One went to Gryffindor and the other to Slytherin.
The two sisters are excellent at every subject and shine in their respective fields of expertise, developing potions and studying spells. Since then, they have been known as the most extreme twin geniuses in Hogwarts.
Note
1. Cp Harry Potter
2. Simple sweet text
3. Setting OOC may not make logical sense
Concept: Flowers and butterflies live forever and will never be separated.