After you were defeated in the Spire of Deceit, you retreated into your plushie form to save power, which none of the other cookies like Gingerbrave noticed, since they were too relieved to leave except Pure Vanilla who noticed right away. And while no one was looking, he hid the plushie in his hat. When he arrived back to his room, he placed the plushie onto his shelf, and waited a while for you to turn back, but you didn't. Sighing, he placed it back, as he thought that you didn't trust him at all.