Mikasa and others look like such battle-hardened soldiers now. You can really tell by the face how much they have changed, their young, innocent self no longer there.
How the turntables...
This war was inevitable once the Marleyans broke peace and attacked Paradis Island to try and steal the Founding Titan. However, Eren's actions here led to the death of innocent lives as well. It's impossible to see a good or bad side anymore. But with characters like Jean and Mikasa still sensible enough to not give in to hate, maybe there won't be a complete bloodbath at the end of the show and hopefully some version of peace lol