FANGBONE! Reader Insert

It's hard enough on its own, having to deal with a Barbarian from another world who knows almost nothing about earth, whilst also battling monsters with him that just so happen to come from the same world, all to try and prevent some War Lord with magic from getting ahold of his missing toe, so he won't be able to destroy both of your worlds, all the while still needing to go to school!

Like, what therapist is gonna listen to that and not have you locked up right away.

Well, Bill, an Orange haired kid from Eastwood, that fights using his weird personality as a weapon, manages to handle it all.

That is, until his mom got that call.

His sister was coming to visit for the next, who knows how long, and his mom wasn't very keen on giving the ginger the reason why.

How will this sudden intrusion effect the so called 'Battle Brothers' relationship. How will it effect Bill and his sister (Y/n)'s relationship? And more importantly, how will Drool use this new kid to his advantage?
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DISCLAIMER:

None of these characters or the story of FANGBONE! belong to me. The only things that do are, (Y/n) and some of the creatures, new "episodes", and new scenes that I add to the story for (Y/n)