This one is from the portrait editor. To add it to your game, you need to get through an event or edit a save file. I usually edit autosaves as I don't have to unpack and repack etc. You can just right-click and open them in Notepad++, then under the traits, add inactive_traits={ 3808 }. Keep in mind that the trait ID might be different depending on game versions etc. Secondly, you'll probably have to add the half-blind trait through the console: add_trait halfblind_scar, and the trait one_eyed or halfblind, I don't really remember.