I can be more (Human Bill Cipher x OC)

Part 1:Normal

I started my day off normal, which was going to the mystery shack to see my little buds (who were younger than me by a good 7 years) Dipper and Mabel Pines. They were just the funniest twins. Opposite but alike something even some twins I have met couldn't perfect.
I entered the shack coughing as dust from the door slid off.
"Laurel!" the twins said at the twins said at the same time.
"Hey guys whats up?" I ask getting ready for Mabel to start up an essay like report because she really would tell me everything that was 'up'.
"Well remember how Dipper was...and so we did find...cool......" I had not continued to listen to her which is unusual because I love how she puts things, but I saw something odd or at least someone. "Laurel?" Dipper asked. Smart kid noticed. "Yes?" I reply knowing I could play it off. "Is something bothering you?" He asked concerned. " No I just didn't get much sleep. I was kinda on my phone. hahaha" I always sound convincing enough sometimes almost too much.
I saw danger just feet away out that window. Why was HE here? He had no business here. I never wanted HIM back in to Gravity Falls's inhabitants' lives. I know that most people didn't know, but elders with collected memories told some fine stories, as did the journal. He is too dangerous for a normal human. "Go get your Grunkle(?) for time"
"M'kay!!!" they say at the same time again... Soon Stan is there and I had the twins go in to the basement unbeknownst to them it was the safe room. "What's wrong?" "Certainly a bit more knowledgeable on emotions than Dipper." "He is still a kid. Almost better than me, but still a kid." "Lets cut the small talk. I think I saw HIM." "HIM?" " yep...and I haven't battled a dream demon yet so I suggest you go tell the kids I left and if I don't return I left town for a bit." "Bye Laurel" he had tears threatening to spill out of his aging eyes with wrinkles appearing when he blinked. "Bye Stan." I hugged the man and left to hunt for HIM.

(A/N)
I feel so cruel for making it end like this. Hello! This is my first story I will try to make the chapters long but if their short I may be doing it because A) I was lazy...
B) It was important to mention, but there are more important stuff to get on to.
C) I didn't get much inspiration.
I tried to leave a little mystery about Laurel. I am really bad with coming up with names. I literally type random letters in until it sounds like a name(?). But Laurel turned up out of the blue so I am super happy.