Yabe has bleached blond hair and some stubble on his chin. He also wears earrings. His natural hair color is black (or dark brown), but it is not shown until Yuri looks at an old photo in Motoko's house.
Yabe is considered to be a player. He gets girlfriends and ends up with a bunch because he forgets that he already had old girlfriends that he is still together with.
Yabe used to be in kendo when he was younger. He quit at some point but, even after years of not practicing, he didn't lose any of his skills.