Murderers up for the taking. 

Bloody Painter:  Make sure you have a lot of art supplies

Sally: Make sure to play with her.

Ben: Buy video games. Don't call him Link or Zelda.

Jeff: Compliment him and don't give him a knife-

EJ: Get kidneys... unless you want to be missing some-

Puppeteer:  Don't get him mad.

LJ: Buy him candy.