Dave Katterttrune is a character in Season 3 of The Good Place. Dave is an architect and the boyfriend of Donna Shellstrop.
Dave Katterttrune was an architect who was in charge of the destruction of a bar that "Diana Tremaine" frequented. After she attempted to get them to stop they quickly got together. The next morning she admitted to him that she was in fact Donna Shelltrop.
Some time later she moved in with him and his daughter and became a sort of mother figure to her, even running for President of the PTA.
One day her daughter, Eleanor, and an older man named Michael arrived to put Donna on the correct path and he welcomed them with open arms. Dave bonded with Michael over their shared love of architecture and Donna was elected as President of the PTA by a landslide.