A hero that has let you down.
It may sound odd, but I never have really had any heroes for them to have the ability to let me down. Maybe I'm a bit of realist because I have seen and experienced so much pain in my life starting at a young age. I think I quickly learned that no one is worthy of that kind of ultimate respect usually associated with a "hero".
The only Hero I have now is Jesus, and He will NEVER let me down!! You never let go!