Vermouth is a cyborg from one of 5 Great Families.
Vermouth is shown to be a sarcastic man who likes to purposely get on people's nerves , such as Marie. However, he is shown to be serious when needed.
As a cyborg, he is stronger than a normal human.
Vermouth never considered them as friends, only view them as no different than him, trash-like people. It's unknown what Amaretto and Strega think about Vermouth. Marie : He sent a message in code to Marie, " trash talking " her, and often teases her, resulting in her freaking out and getting mad at him.