He could sense that Zero wasn't too far off. Perhaps it would be best to wait for his arrival. He didn't know how strong Spike was, but it wouldn't do to send someone in there that didn't understand what he was up against. "I know you can, Yuuki." He turned to face her, a gentle expression masking the apprehension he was really feeling. "But it would be best if you contacted the others and located Aidou."
If anything, he wanted to assess the situation before he allowed Yuuki to enter the theater. He would have preferred that someone else fight their uncle, but if the hunter didn't arrive shortly, there would be a need to form lies about why Kaname was unable to kill him. If Yuuki was standing nearby, she might catch an exchange that he would rather be kept a secret. And if Rido was in such a weakened state and able to be killed, she would realize this and ruin his chances of devising an excuse.
"If I need you, I will call for you. But we have no way of knowing what sort of traps he might have set up out here. At least until Kiryuu arrives, please keep those in the vicinity safe."