Jinx is not a madman,just too simple to make herself happy.A selfish person.
“Life is constantly looking for fun."This is the life goal of Jinx’s life. So there is a contrast between Ekko and Jinx. A boy who stuck in the past and A girl who just want to live for tomorrow. I always thinking:"How does Jinx looks before she get crazy.”
Then I find something interesting about Jinx from Riot:
“I feel that Fishbones represents Jinx’s subconscious preoccupations and desires - her hidden, repressed self.
She may be a crazy party girl outwardly, but she has some latent desire for normalcy on some level, which I think is fascinating.”
Maybe she didn’t change,just to hide something and think it is necessary.
“Feelings and emotions, life and death, things… No matter how you work at it,it all ends in futility.”
When Ekko answer the question from Jinx. Looks like he is talking about his story but with an indifferent tone. Several years later,lots of things are become not that important. It seems like you can talk about these things without any feelings.
“We all gotta die sometime! Unbecoming?Nobody gives a damn!”
Anyway,what is the point I want to say is : Don’t try to think complicated,no one will really care and spend lots of time to understand what you’re thinking.