Batman, a.k.a. Bruce Wayne, is the titular main protagonist of Christopher Nolan's The Dark Knight Trilogy. He is a billionaire socialite who dedicates himself as the protector Gotham City, as its the highly trained costumed vigilante under the alias of Batman.
There are roughly one-sh*t billion tropes so PLEASE look through them before adding one. Otherwise add what you like. ADDITION: PLEASE read through the trope description provided before submitting something. It's not a huge deal but too often people submit characters that don't fit just because they misinterpreted the title...