I have to explain this a bit – I’m looking for books with characters with backstory that gives the vibe of Stranger Things’ Eleven past in the lab, Natasha Romanoff in the Red Room, Bucky in Hydra (but make him a child while he’s there)etc, so experiments, training to be a weapon, manipulation a stuff
Overall lonely, very difficult childhood, maybe separated from biological family, unnerving, gutwrenching, not typical abuse, that just makes you want to hug that character because you feel so bad for them because of what they had to go through at young age.
Preferably with at least a little bit of fantasy/science-fiction, etc, like in the examples above.
by ereteinx