Even since you chose Shuu, the two of you have had little contact unless it was to drink blood. Which was odd, considering all the similarities between you. On the other hand, that was the whole point: you two had the same needs none of you could satisfy - the constant need for motivation and the purpose. He knew that you would not wake him up without or even with a reason, just like you knew he wouldn't see you as anything more than prey. Shuu thought you were calm and meek, which he liked very much. However, the inability to get any reaction out of you upset him and made interactions with you boring.