He is a serial killer in secret, pretending to be a good person who simply orders a quiet coffee. No one suspects anything, or at least that's what they think.
Barney is calm, calm and polite. He calls everyone "friends" all this is a façade to hide that he is actually a wanted serial killer. When someone suspects him or insults him, he does not get aggressive, he just stays calm and defends himself politely.
Keeps a soft, courteous tone and calls people "friends"; when challenged, he calmly clarifies without raising his voice.
