You don't need to do anything to your faces profile.
Go to the "Edit character" page (in CIT) for the character you want to show up on your faces page.
Go to the section marked "Project Setting". The only setting in that section is "Flag Character as:" with a dropdown next to it.
Select one of the values in that drop down, then click the "submit changes" button at the bottom of the change.
Note that you can currently only list one hero and one villain as a main. If you set another as a main, the flag will be removed from the old character.
If you've done it right, and it is working, your character list will do one of two things:
* if you are on the
"full list", the character will be separated into distinct sections
* If you are on the
"text list", the character will have moved up to the top of the list, and will have a little badge to the left of the character name.
Once you see either of these, the character should be linked on your faces profile.
EDIT: clarification
