One word: Bloodwrath.

He hasn't yet gotten used to some of the weirder aspects of the PPC...the snaperrifle will utterly freak him out. He may start hitting things, and he may become convinced that this is somehow Maria's fault.

you can have Cassie, Nat or Tyler.

Cassie might not realise straight away, but when she does she'll panic and ask everyone in range what to do. Nat will realise that instant, and she'll go methodically berserk. As in, hunt down whoever did it and threaten them (maybe even get a little violent) till they change her back. Tyler would just be bewildered, and probably try to take the snaperrifle to DoSAT for examination.

It's really up to you. Lunac is more straightlaced, so if he got shot with sugar, he'd really let loose for once. But if it were Arti, considering he's many-times over insane, having just turned much of the PPC temporarily into females, then you're asking for insanity in epic proportions. Anyways, either is free for you to use.