Vivian is best characterized by her shyness. Unlike other Shadow Sirens, Vivian is actually caring and kind. She wonders if it is bad to do away with others and is often a forgiving person. She seems to have a fondness for jewelry. However, she seems really afraid and self-deprecating due to the fact that she was kicked out by her abusive older sisters; Beldam and Marilyn, who bully her due to her age and gender identity.