The Sims 4 – How can I change my character's traits?
This article is about The Sims 4 how to change character traits and what to do to do so.
The Sims 4 how to change character traits
You can open the cheat console by pressing CTRL + Shift + C and typing “testingcheats on” (without the quotes). Hit Enter, then type: cas.fulleditmode (again without the quotes) and hit Enter again.
Hit ESC to close the cheat console, and once you've done that, you can, while holding Shift + Click on any sim to edit anything about it in Create A Sim, just as if you were creating them for the first time.
So go ahead, Shift-click on them and click “Edit in CAS” and you can change their traits (as well as anything else you normally change when you first create them). You can even use it to change their age, appearance, gender, voice, and more. Be careful not to change anything you don't want.

And that's all you need to know about how to change character traits in The Sims 4.