Characters Deleting when scene opens, but showing up when playing game

I’m currently using Unreal 5.0.3
I’m creating my first project, and currently am trying to make a character. I followed a tutorial that worked. The character can jump, move around, sprint, and crouch. Whenever I open the project after closing it, My character object isn’t there anymore, and I have to put it back in the project. When I run the project, I can see my past characters that I put in, but in the editor they don’t seem to exist. I couldn’t find any proof of there existence aside from when it’s being run, and I don’t know what to do. Can you help?