When creating a character, a player can add a third bonus trait with a stat of +0. Whenever that trait is used, a skull will automatically be rolled, and the character will obtain +1 Power Point. It should be something your character is bad at. Don't confuse roleplay flaws with mechanical flaws.
Example
Rojar has a flaw trait "Law-Abiding": 0 - Stealth, lockpicking, deception.
GM: You see a locked door in front of you.
Rojar: -- tries to pick a lock --
Rojar rolls Agility + Law-Abiding: 💀★★
GM: The door opens and squeaks very loudly, alerting the enemies.
Rojar gets +1 Power
Example
Rojar has a flaw trait "Law-Abiding": 0 - Stealth, lockpicking, deception.GM: You see a locked door in front of you.
Rojar: -- tries to pick a lock --
Rojar rolls Agility + Law-Abiding: 💀★★
GM: The door opens and squeaks very loudly, alerting the enemies.
Rojar gets +1 Power