Honestly putting the kiss scene aside and everything Princess Elise is actually a fucking wonderful and strong character.

She has such a strong will power that she held on to her promise and didn't cry for years. She still jumped off a ship high off the ground even if she might+

Die. She still went on and gave herself in for Eggman so he wouldnt hurt Soleanna.

She's a very responsible and mature person if you actually pay attention to why she got captured all the time.

And the "I dont care what happens to the world!" Can be viewed from many sides:

Personally I feel like she didn't wanna erase all the friendships she's made because she finally learned all about fun and adventure and validating her feelings and letting them out thanks to Sonic.

Having to hold a demon inside isn't easy and I respect her for+

Being able to hold it in.

Also she's pretty