Bless her. Sounds like she really wants to go outside. When Felix goes outside it's normally at night so then we have to get him in with some nice food but if that doesn't work then I'm out there in the cold running around after a cat like a mad woman.
But thankfully most of the time he takes the food and come's inside like a good boy. I've only ever had to go outside to get him about once. I think...
Yes her character changing is normal
I was like that when we had Lily spayed she came back and would sit on my lap for hours and purr really loud and then wake me up in the morning with a loud meow.
I miss waking up with her face looking at me with a Feed me expression on it