Lore: COSTUME-Y is a AI that was scrapped by the scratch team due to unfortunate events and circumstances that resulted in fatalities. It was supposed to be a personal assistant that will take action on any form of plagiarism or harassment in the site, it’s project that it resides in suffered a major problem. Whenever someone clicked on it, the ai would manifest itself inside the person’s house. Not showing up in the project anymore, and practically hunting them. There are a few surviving techniques when this happens. You need to be near the device the project is on to be able to climb into the project, ultimately transferring you into the project as a randomly picked vessel resembling the mascot. Those who were deceased by costume-y will also take this form, but as husks.
Possible answers: Q: does it have an official gender? A: yes and no, it is unknown what the ai’s gender is but the vessel it uses is female. Q: how many survived this thing? A: around 14 - 13. You’ll see them in projects soon. Q: is costumeY able to show any emotions? A: nope, only sadistic smiles.