It happened on the next day, that an evil spirit from God came mightily on Saul, and he prophesied in the midst of the house: and David played with his hand, as he did day by day. Saul had his spear in his hand;
So I don't know what kind of a daughter she was. I don't know but he figured she'd be a snare to David and give him problems, which she did in time.