Meet the suspects

Your bungling underling Fergus Christopherson greets you nervously.
"This is a tricky one, boss. All three suspects deny it was them. But it must have been one of them. There's one who looks like a real nasty piece of work."
You tell him to leave the detectiving to you. "OK, you're the boss. Just click my name when you think you know who did it."
There are three suspects:
Stevie Margarets - an underpaid librarian at the Sheriff Court. She is respectably dressed and looks demure in her Hello Kitty spectacles.
Hell Badman - a former academic librarian and very suspicious looking. He's wearing a black and white hooped tshirt over an orange jumpsuit and picking his teeth with a flick knife.
Kally Sirtaki - a Greek librarian. You can tell she's Greek because she's wearing a peplon, chiton and himation. Also these are labelled clearly in latin characters for your convenience.
What do you want to ask them about?
Ask about HELL 
Ask about the notepad
Ask about promotions
Go to the first floor