Very cute; I like how you've done the knees and the scalloping on the undies. Good shading as always too (am I right you've used different pencil strengths here? Good use of them). You've been getting disturbingly good at drawing rears this lately too.
I don't see how anyone could not love Ursula, she's too much of a cutie.
btw, I love how you did the eyes in this one, so big, and they add so much sweetness and innocence to her character :> I haven't been to Ryusei's page in ages, so I don't remember if she had big eyes in his drawings are not.