![](https://cdn.animecharacters.io/images/characters/large/1419-941f1e60.jpg)
Daiki Niwa (丹羽大樹)
Daiki is Daisuke's grandfather and Emiko's father. He was Dark 40 years ago. Unlike Daisuke, he took the task of stealing as though it was a job. He appears more in the manga than he does in the anime and is more than often goofy and silly.