Better not underestimate me, Miss Tohsaka. Once I have my mind set on something, I don't stop until I see it through!

[Does she realize that that 'something' is 'banging a whole lot of people'? She can worry about reality later. But as head-in-the-clouds as she may be, she is not lying about her stubbornness.]

--Oh, oh! Is this the beginning of a rivalry? Maybe even a rivalry...to more? Neat!