Hunted (3.5e Flaw)
From D&D Wiki
You have enemies who will stop at nothing to find you, enemies to whom you are vulnerable.
Effect: When you select this flaw, your DM chooses one race or group common to your campaign. Members of this group have a +2 competence bonus to Gather Information, Spot, Listen and Sense Motive checks made to locate or identify you; and to attack rolls made against you.
Roleplaying Ideas: This flaw should be a reflection of something that happened in your past. Perhaps you angered an emperor, and his assassins are always waiting for you to appear. Maybe a prophesy was made at the time of your birth that a demon will stop at nothing to prevent coming true.