Daisuke Niwa Or Dark: Which Is Which?

I got hooked up every Saturday afternoon in TV 5 because they aired a marathon of DN Angel which was originally aired in QTV 11.



Daisuke Niwa is a 14-year-old boy who has a special genetic ability: whenever he sees or thinks about his crush, Risa Harada, he turns into the infamous phantom thief Dark. Satoshi Hiwatari is a student at the same school as Daisuke and the Harada twins, as well as the Commander of the police force who is heading the investigation on Dark. He is also member of the Hikari family, a clan of artists which has opposed the Niwa family of thieves for centuries.

Is Daisuke Niwa good or bad? What do you think?