Hey only started reading issues but it’s amazingggg and a song immediately came into my head that would work. It’s called shed a tear, by Kodaline. I feel like it’s how Astrid feels about all of the slytherins. Here’s just some of the lyrics
It's harder to see through the eyes of a stranger
It's easy to love when the world doesn't hate you
When you're tryna sing out, but nobody hears a word
It's safer to swim when the tide's not against you
I know that you've been here before
(Never letting go)
Giving up is letting go
(Never fight alone)
But you don't have to fight alone
I'll shed a tear for you
Open your eyes, I'm by your side
I'm never leaving you
Darkness to light
Stay through the night
I'm walking in your shoes
So you know that it's the truth
When nobody's here for you
Let me make it clear
That I'll shed a, I'll shed a tear