Avid was a tragedy because he didn't get to grow and find his identity, his chance to make choices were cut short.
Pyro was a tragedy because he let other people's perceptions of him shape who he became and never made the choice for himself.
Owen was a tragedy because he chose to stay hurt and stuck in the past rather than changing, because moving on meant losing Louis.
Legs was a tragedy because he didn't think that choosing to be good right now mattered after all the monstrous choices he'd made before.
Martyn was a tragedy because no amount of choices would have changed his fate, he was doomed from the bridge.
Ren was a tragedy because his choice to change and trust the vampires was such an accidental disaster that it convinced him that change was wrong.
Cleo was a triumph because she chose peace and chose love over revenge, she could have killed all the vampires for what vampires had done to her but she didn't and she made it out.
Pearl was a triumph because she chose to stick to her morals and give everyone else the choice to be better too.
Shelby was a triumph because even after killing Pyro, she didn't keep going down the path of revenge and instead chose to walk away.
Scott was a triumph because he chose to care and let the hard shell of eternal apathy crack and grieve and grow.
Drift was a triumph because she chose to be brave, to take charge of her destiny and stand up for herself.
Apo was a triumph because even though everything she tried to do failed, over and over again, she still chose humanity and the town.
Abolish was a triumph because he didn't have to do paperwork.