Samurai Jack - I knew It was reminding me something

>Ignorant of outside world until meeting the protagonist
>Saves the protagonist from depression and hopelessness by reminding his true purpose
>Falls in love with the protagonist
>Revealed to be actually the antagonist’s “daughter”
>Returns to her evil nature, wearing a skintight suit of their evil aesthetic
>Brought to her senses by power of love
>Helps the protagonist to defeat her creator, despite knowing full well she relies on their existence to exist

Wait a second is this…

>Fades away from existing during a wedding
>Protagonist wanders around the world again

What did they mean by this?