Honestly my favorite headcannon for Anti is that he's a monster. He can glitch to places and make people confused and worried. He always has his knife on him no matter what. Every time he's about to take control of Jack; Jack gets dizzy, gets black spots on his hands, his throat burns, and his nose bleeds. Jack is always in Anti's mind. Like a loud ringing that won't go away. Anti kills very quickly and gets the job done very fast. He wants Jack gone. Anti wants what Jack has. Attention...
It’s so cool to hear about the different headcanons for Anti; I love that Jack leaned into all those differences during October, and that there isn’t a set, canon version of him. All the different ways people interpret him are so awesome to hear about. Like this glitchy-monster version, definitely cool. I totally see him as craving attention, for sure. What a diva, haha.

