So I can’t find a fanfic I was reading, and I'm hoping that someone will see this and be able to tell me what it's called. (because in the 30 minutes I've been looking I can’t) The fic went kinda like this.
Keith becomes purple and Galran. Allura thinks he’s a galra and attacks him. Keith hides in the castle air vents. Allura realizes the red Bayard responded to ‘the galra’ and that she might have just tried to kill Keith. She alerts the team, and they try to get Keith to come out. He refuses. There are a couple chapter of them adjusting to him living in the vents (Hunk/Lance talks/yells at the celling, pidge makes little beetle bots to try and spy on him, etc.)
I don’t really remember anything else, but if you find it let me know.
Ps I think I had a really short summary, that had to due with Keith hiding in the air vents. I also think it was on AO3. Thanks.