Parts 1&3 are over at @narwhalwallruss101 's book.

Previously
Hufflepuff: ANNOYING TIME!

Liam: so who to annoy first?

Hufflepuff: BILL!

Liam: which one?

Hufflepuff: why not both?

Liam: *shrug* ok

AT THE PLACED WHERE THE BILLS ARE HIDING FROM US

M Bill: ...

O Bill: ...

M Bill: ...

O Bill: ...

M Bill: ...

O Bill: ...

M Bill: ... so, do you have a special someone?

O Bill: loneliness

M Bill: ?

O Bill: do you?

M Bill: yea *dreamy look* Shooting Star

O Bill: Shooting Star? Isn't she, ya know, twelve?

M Bill: it's a complicated situation, but we don't do anything inappropriate. Although apparently in the future we have eight kids

O Bill: ?

Lila: *pops up* hiya!

O Bill: AH!

M Bill: shhhhhhhhhh

Hufflepuff: to late! Found you!

Liam: BWAHAHAHAHAHA *takes O Bill's hat*

O Bill: STOP TAKING MY HAT!

Liam: ... nah, I'm good.

Phoenix: *walks in as a puppy* !

Hufflepuff: puppy!

Phoenix: *turns human*

Hufflepuff: !

Liam: !

Bills: !

Phoenix: long story short I can do that now, and now Kat has my fire powers *walks out of the room*

Hufflepuff: All for pretending that didn't happen say 'aye'

Liam Bills Lila Hufflepuff: aye

Lila: this is weird, two of my dads!

O Bill: he's your dad?

Lila: ya

Billina: *sticks head in the room* mine to *goes back to what she was doing*

RANDOM EXPLOSION IS RANDOM

Hufflepuff: what the!?!?

Liam: *looks at the reader, (yes you! I'm talking about you)* demons

Bella: well that's not creepy

Hufflepuff: aren't you a demon?

Bella: half demon.

Lila: me to!

Liam: great now you two can start a club, WE NEED TO TAKE CARE OF THE DEMONS!

M Pacifica: haven't we done this before?

O Dipper: what!?

M Dipper: yea, I died

O Dipper: WHAT!?

Hufflepuff: oh I know what you guys are talking about, no that was when we *cough* stupidly *cough* gave Bill the rift... wow that was a long time ago.

Kat: wow ... it was!

Hufflepuff: it was before you joined!

Kat: IT WAS!!!!!

O people: ...

M People: *walking down memory lane*

Liam: ... why

Hufflepuff: oh, right, demons. READY YOUR WEPONS!

Both Mabel's:

Lila:

(Don't judge that took me a half hour to make)

Both Bills:

M Dipper: we don't all have weapons

Liam and Hufflepuff: *hand out weapons*

Dippers:

(I've done the best with what I've got)

Pacifica's:

(I'll just go bang my head against a wall now)

ONE EPIC BATTLE SEQUENCE LATER

Liam: I think that we should get back home.

Hufflepuff: sadly so do I

O People: *walk through portal*

Hufflepuff: Liam, I want to talk to you

Liam: ok

In another room

Liam: what is it?

Hufflepuff: you should tell them

Liam: tell them what?

Hufflepuff: that you fight demons, that you have awesome magical powers!

Liam: !?

Hufflepuff: I know things, now go on!

Liam: *about to walk through portal*

SECOND RANDOM EXPLOSION IS JUST AS RANDOM

Super scary Monster (just trust me on that): SKREEEEEEEECH

M People: !!!! ... AHHHH *all run in different*

Hufflepuff: the heck is that!?

Liam: a freaking demon

SSM: *attacks Liam*

TO BE CONTINUED