As you can see there is a character name on the left and a spawn info name on the right. Once you open the xtbl file with notepad++ it will look something like the link I shared with you. Press ctrl f and search for the character name you want changed, then on that same row of the character, change the spawn info found to the right side. Look at the photo I sent you for reference.
If you want an untouched character.xtbl file without any of the edits I have already made then you're going to need to extract one of the files in the game.
However this is an extraction tool that only works for saints row 3, not remastered. But if you extract a character.xtbl file from sr3 and paste it into saints row remastered it will work, thats what I did. However I opt you go for the first option causer this second option is more of a hassle. Hope this helps.