Elfen Lied, Yakusoku no Neverland Recommendations
Innocent victim. Elfen Lied And The Promised Neverland both feature young individuals who have seen the dark side of the world they situate in first hand.
Elfen Lied does this with Lucy as she is to be hunted down for what she is. TPN is the same with the Grace Field Children to be farmed due to their place in this new chain of beings. Without going into too many spoilers, they both have an ironic situation to do with aid later on in the stories.
Both are good manga with TPN being psychological in terms of mind games, Elfen Lied having a different psychological aspect with