Jacksepticeye:

You and Jack loved Halloween! But, you two just handed out candy and watched horror movies all night, with some video games that were horror too!

You two would eat most of the candy you bought for the kids that would trick or treat. But, you two would still enjoy it. Even if you didn't go outside.  But, you did scare Jack a lot to keep him up all night as he promised. 

Antisepticeye:

Every time a kid would try and trick or treat Anti would scare the living daylights out of them, making the kids drop all their candy for Anti to take.

You would sternly tell him he couldn't do this all night because it was wrong, but. You did like it since Anti would give you half the candy.  Oh well, scaring kids is more fun anyway. 

Chase:

You and Chase dressed up and went trick or treating. Yes, you two were grown adults but why can't adults enjoy the night? Chase was glad you went with him.

You two would get weird looks from all the adults at how childish you two were together, but it didn't matter to you.  As long as you were with your boyfriend.

Doctor Schneeplestein:

Henrik would forbid you from going trick or treating, saying how too much candy could be made you sick or give you a stomach ache.  And he didn't want that.

But, you would find him eating candy while watching a show, stealing most of his candy you would scold him for not letting you have any.  But you would join him watching the show anyway. 

Magic Marvin:

Marvin LOVED Halloween! The candy, the costumes, the decorations, the candy. You. Did he say candy twice? Yep! He loved it!

He was so happy he was invited to Anti's Halloween party, he could do some party tricks, and maybe even scares if he was feeling for it.  But, he was mostly happy with you. His smile lasted all night long.