From LEGO Batman Wiki
As a child he witnessed his parents' murder and decided to devote his life to cleaning up crime in Gotham City. He is a successful billionaire businessman and is the C.E.O. of Wayne Tech. The public think of him as an irresponsible playboy, but they do not know his secret, that of him being the crime fighter, Batman. He also has a trusted confidante named Alfred Pennyworth.
In LEGO Batman
Bruce has straight black hair, an unbuttoned blue suit, revealing a white undershirt and black tie while also having blue pants and a black briefcase.