Helena

She doesn't talk at all, at least in the bar. So, others don't know much about her. Sammy knows. But she doesn't share much. Not about her. She even goes further and warns you: "Trust me, you don't want her around you anyway. That's better for everyone. She is the most dangerous one out of them by far. So she looks at your way and opens her mouth? Time to run if you value your life."