@VOID To make "beaty" into "baddy" you need to remove 2x letters and add 2x. To turn "beaty" into "beauty" you only need to add 1x letter. Occam's Razor would suggest that the word being "beauty" is 3x more likely than it being "baddy". Also, due to the context it wouldn't really make sense for the word to be "baddy" when reading the text.
But... who really knows? It's an extremely poorly translated Chinese manhua. It honestly could have been anything. Well... anything except baddy. :D