>>98976805Wrong, none of that is implied to be connected to her changes. Marceline stopped lost most of her main traits before those events
For example she was an adventurer just like Finn the reason why she and him became friends closer is how he noticed even though she was a jerk that she shared his love for facing danger and helping people.
The was never any reason or explanation for her stopping being a trickster, in her fist episodes she always enjoyed scaring and manipulating others in harmless ways while secretly helping them, in fact she originally planned stop seeing finn because she couldn't fool him anymore after so many pranks
There was never any development on why she lost those interests at all, she simply show up without them after 7 apparences without any explanation at all
