Virgil~
Virgil puts his hoodie up and over his face whenever he's nervous or really anxious. Well, his voice also goes really deep and scary when he's anxious. So whenever he does these things, you know when to step in and yell/scold at whoever made him nervous. If you were making him nervous, you would quickly find what was making him nervous and ask him if he wanted you to change that thing.

Roman~
Roman's voice will crack and he will barely talk. He looks around while he barely talks, only stating things that have nothing to do with the topic. When he does this, you usually hold his hand and let him squeeze it. It lets him know that there is something to keep him from becoming more nervous.

Logan~
Logan will become annoyed with everyone and everything. Now, Logan doesn't get nervous a lot but when he does you're there to swoop in for him. Sure he becomes annoyed with you but you know he's just nervous so you'll play with his hair. It'll calm him down and he won't snap at everyone as much.

Patton~
Patton will hug whatever he is holding and just stare at the person that is making him nervous. When this happens, you will either hug him or stay close to him. If you two are in public, you still hold his hand and stand close to him. If it's after a hard day or after arguing with the others, you two will cuddle and you'll listen to him rant about it.

Deceit~
Deceit will get angry and annoyed easily and he will nearly tear his hair out. So you have to hold him hands so he doesn't tear his hair out. He will try to run his hands through his hair so you just hold him hand while running your fingers through his hair, calming him down.