"just a fictional character"
No
It's Natasha jumping off that cliff to bring back Maria and Maria dies a few years later anyways
It's Fury holding Maria in his arms while she thought he shot her
It's Peter being alone for the rest of his life
It's Sirius not knowing Regulus died trying to stop Voldemort
It's Sirius treating Harry like James instead of his own person
It's James dying thinking Peter had the information t**tured out of him
It's katniss volunteering to save prim and prim dies a few years later anyways because of Gale
It's Percy understanding why Luke turned
It's Annabeth breaking in Mark of Athena
It's Will solace fighting in THREE wars
It's Nico di Angelo always being told his sister was better (she died)