After the attack on Cross Academy to get Yuuki, Rido hid. He knew that he couldn't go and attack Yuuki. Not when she was back to being a Pureblood, and that Kaname was with her. So he figured the next best thing was to go for what he tucked away. He figured to keep it away as he didn't feel like he need it. That is till Kaname harmed him enough to need his secret little Human.
