Apparently the googly-eyed thing on her head really is just a hat, even though arists seem to depict it like it's part of her body (it's often floating around her like myon when not worn). Considering that, there are some pictures of her where it is not present, yet no posts appear in the search of ononoki_yotsugi no_hat, and only a few of the many applicable posts appear when searching ononoki_yotsugi hat_removed. Also, in posts where it is both present and worn, it frequently isn't tagged as a hat. A single post has it tagged as a mini_hat — is there a consensus on whether it is one?

It seems all her posts deserve a review in regards to tagging of the hat.