Oh, good, Halloween questions!

Isabelle loves to be spooked. Scary movies, haunted houses...He's a bit of a thrill seeker, and being scared in safe fun ways usually makes him jump and shriek, then laugh as he tries to catch his breath.

Meanwhile, Alec is very unsatisfying to scare. He's hard to scare in the first place, and even when you've successfully startled him, he's good at repressing his reactions except for maybe a jolt at most. However, he'll happily over-perform against his own nature to entertain people if he likes them enough.

Viola only really lets people she's very close to scare her for fun. Aster, Andre, and Alec (lord, I need to kick the A-name habit) are the only examples that come to mind. With anyone else she'd be very crabby if they tried it, but with those she loves, she'll laugh once she's recovered from the fright.