[Harry Potter] Potter's Sister Is a Slytherin

[Read with caution: otome + lots of original ideas + apologies for OOC; all pairings]

The Sorting Ceremony begins:

When the shabby Sorting Hat fell unusually silent atop her moonlit hair, every eye in the Great Hall turned toward “The Chosen One’s sister.”

After a long while, the Hat murmured in her mind in a playful voice only she could hear: “...How interesting. Such a gentle soul, yet harboring Slytherin cunning and ambition... And so many... ‘echoes’ from different points in time. So, where would you like to go, little silent reader?”

Chloe’s fingertips were ice-cold. She lifted her dark green eyes and answered softly, “Please send me... somewhere I can dream in peace.”

The Hat’s brim suddenly split open, and it shouted:

“Slytherin!”