{for the people who don't know the sibling au, it's basically the betas and pilots being the siblings of the canons, so pilot Luz is Luca, beta Luz is Lucia, beta willow is wionna, canon is willow pilot well her Nickname will be trashy, beta Amity is Amelia, pilot Amity is amber and canon amity is well amity, Gus is gus and we don't really know what would his beta brother's name be but I will call him gunter and so on also before you ask about why Luca is a male, luca is in the au a trans male, I adore that from the au a lot, he's the smart and caring type and knows what he wants, even tho he isn't really close to lucia, he still cares, you will find out more in the story!)
It was a calm morning nothing going on till an explosion happened and three siblings flew because of the explosion, you're wondering how this happened, well to know how this happened, we have to go all the way back to the day they first appeared.
No not their birth just the day that not only Luz arrived in the boiling isle, the day her two older siblings arrived there.
Two siblings were falling from the sky and they screamed, the brother screamed in horror as he held onto his skateboard, his sister Lucia stopped with screaming and shrugged. "Guess I die then...OOOOH MY SLUSHIE IS THERE" she air swam towards it and grabbed it before calmly drinking it.
Luca fell into some trees getting stuck between two branches because of his skateboard, Lucia just managed to fall on a abomination that a witch might have summoned, she wasn't happy about it but she shrugged, she sighed and stretched. "Okay okay, here we are in....what is this place...?", She asked herself, she saw a fairy flying to her and becoming creepy. "Let me eat your skin!", The tiny creature said as the human just smacked the vile creature. "I hate mosquitoes, mostly when they can also talk.."
Her brother Luca managed to get out of the trees, he looked around in horror and went to his older sister. "What have you done!, I told you I didn't want to be in your criminal deeds!, What are you planning oh wait let me guess you took Luz away from home!", He yelled at her but Lucia of course didn't care. "Shush, let's just beat people up till they tell us where we are..", the criminal sibling said as the middle child face palmed.
"This is why I don't want to hang out with you!", He walked away and groaned.
He went looking around, the place seemed very interesting, there's a lot of wood as he tried to make sure he went to the right direction, he heard his older sister follow him and he didn't like it at all.
Meanwhile in the owl house:
Luz was cleaning up and Eda cooking, the two were just having a nice time together as they hummed and they wanted just to chill out after a while, king was drawnng his choatic heart out and hooty was well choking on a leaf because he's a crazy owl.
It was just going to be the three of them till they heard some commotion happening outside and heard a knock, Eda walked towards the door and opened it before she knew it, there was another Noceda, Lucia ran off to not beat her little brother up so she looked confused and yelled: "WHAT IN THE BOILING ISLE FU!?", She turned around and saw Luz looking confused at Eda. "Frick, I mean frick, kid why is there another of you?"
Luz looked confused even more before walking over to her side and peeking in as her eyes widened. "Luca?" She spoke out.
Luca looked surprised and hugged her quickly and squeezed her in his protective arms. "Where were you!, Why did you leave, don't you know mom is scared mindless about you!", he yelled at her but calmed down for his little sister as the two kept hugging.
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owl house Sibling au fanfic
Fanfictionthis is about the sibling au but what if the siblings did go to the boiling isle well here is my story on it.