He is also the weilder of the 2nd keysaber.
While not evil like most dark sides, he is rather perverted to an extent and can be incredibly ecchi; despite this, he still can act like a complete gentleman and is also a skilled fighter.
*A CCS H manga falls from Dark's jacket* "How'd that get there? Look over there!" *yoink and dashes off* -Dark in his interview from 'Behind the Dance'