In removing his scarf and baring his tattoo, Katakuri liberated himself.

I'm not good at animating liquid mochi orz

Edit: This was supposed to be a gif animation but pixiv didn't retain it. The animated version can be found on my tumblr here: http://sephirona.tumblr.com/post/171291462951/freedom-in-removing-his-scarf-and-baring-his