It's Ikena from Hitoribocchi! And I redrew her! That means that I took an official art of her, traced the lines, and then made those parts move. Hold [space] to hold the animation still. Press [R] to see the original art. You can also drag the parts around! That'll get messy, though.
This is quite an old project! I thought it'd be a shame to have it be unshared for the rest of time, and thus I decided to share it. Behold! Art. Some might even say #Art The character, music, and reference art are all part of Hitoribocchi. The art in question was drawn by Katsuwo, the author of the manga!
