(Suggested by GreyJay13 thanks!)

Dipper turns on camera.
   "Hi!!" Pacifica yelled.
   "Welcome back to Dipper and Pacifica react to ships!" Dipper said.
   "Today we will be reacting to Mabel x Mermando!" Pacifica cheerfully yelled.
"I don't know they kinda don't have anything in common. I mean Mabel is a human and he's some kind of man fish!" Dipper yelled.
"He's a Mermaid. And you're probably just saying that because she's your sister. You very protective over her and you don't want her to date." Pacifica teased.
   "W-what that's not true!!" Dipper smirked.
"What-oh wait-this is a prank." Pacifica said as Dipper dumped fake but real looking spiders on Pacifica.
"AHH!!!! DIPPER I WILL KILL YOU!!!!" Pacifica yelled.
"Oh crap bye." Dipper quickly turned off the camera.