I tried to research the instance in whether or not a kwami disappears when a miraculous is taken forcibly or just taken off in general, and all I could gather was that it's all about intent. If you don't want to have the miraculous anymore and you take it off, (such as what Marinette did in the Origin's episodes) then the kwami will disappear. If the miraculous falls off by accident (such as when Adrien's ring fell off during Lady Wifi) then the kwami will not disappear. However, I couldn't find a clear answer about the miraculous being forcibly taken. So, for the sake of this fanfic I'm going to say that the kwami does disappear when the miraculous is taken off at all. So… I guess you could say this is an extremely slight AU? I don't know haha :) Anyways, here is The Moth Guardian. Enjoy!
Also, quick note, here's a huge thank you to CrystalHeartZyx for helping spark the idea of this fanfic! This sequel wouldn't exist without their help, so make sure to check them out!
The white butterflies chaotically fluttered throughout the dome shaped room as if they were trying to escape Hawk Moth's dark touch. Gabriel slowly paced the room, gripping his hair with a stiff hand. His usual clean sophisticated poster was rugged and disheveled, and his clothes were wrinkled and bent. "There's no way he could be back… there's no possible way…" He muttered to himself, gritting his teeth as he turned on his heel to continue his useless march. "My… head…" Gabriel moaned, halting in his tracks. Both hands flew to his head as he fell onto his knees.
"M-master?" Nooroo squeaked quietly, peeping out from the shadows. "Master what's wrong?"
Gabriel's hands fell to his side, and he glanced over his shoulder at his enslaved kwami. "I don't feel like myself… I feel like… how… Adrien felt when…" He paused, his head throbbing painfully. "M-my son… Chat Noir…" He groaned once more as his head once again fell into his cold hands. "I see him in… my head."
"W-what do you mean m-master?" Nooroo asked timidly.
"I'm talking about Imperiumal you useless twit!" Gabriel suddenly shouted, glaring fiercely over his shoulder as Nooroo let out a squeak. "He's in my dreams… in my head…" He added shakily, his breathing shallow.
Nooroo slowly recovered from his moment of terror from Gabriel's outburst. "B-but Ladybug and Chat Noir defeated Imperiumal! How could he… how could he be b-back?"
"He can't! But he's there, Nooroo. He's still there! And why is he still there? In my head?" Gabriel let out a bark of laughter, poking his head with a shaky finger. He jumped to his feet. "I don't know! For once I don't know! I didn't know about my son, now did I? My son that I've been fighting and aiming to defeat for months! For months! How could Adrien keep that from me? How could he betray me like this?!"
Nooroo squeaked again and quickly flew back into the shadows, hovering close to the ground to avoid being seen. "Master you must calm down! You've been like this for two weeks."
"My son has been my enemy for a year!" Gabriel fired back, his eyes wild. "And now I have to deal with a constant headache and Imperiumal infested nightmares!" He started to pace once more, muttering under his breath. "There's no way he's back…"