of course that is possible, just drag and drop the other character on the character you want to replace (or select the character you want to replace and double click on the new character).
In case the two characters have very different sizes or shapes you risk having undesirable effects.
What amazes me is that you didn't try to do it.
It is always informative and interesting to experiment.
Save your project before doing the experiment and if it doesn't work you can go back or use UNDO to undo what doesn't suit you