Secret Identity (3.5e Feat)
From D&D Wiki
Secret Identity [Honing]
Your character's unmasked self is unknown to most.
Prerequisite: Use of the Super or Sinister supplemental mechanic
Benefit: Your secret identity is basically an entirely different individual, with your superhero maintaining different personality quirks and traits to maintain the facade. Duplicate your character sheet and then remove all your Super or Sinister powers and reallocate your skill points. This "second character" will be your character while out of costume.
Normal: A character would normally not have a second identity to utilize for infiltration and detective work.