Vulgar, overly confident, and sharp-tongued, Jillian is an overbearing presence who thinks very highly of herself. She’s proud of what she is and is always looking for a fight to prove her worth. To put it mildly, Jillian is a bully. She is prone to violence and has rather sadistic tendencies. She takes no issue with harming others to fulfill orders, get what she wants, or just to have fun.
Despite her haphazard attitude, Jillian possesses rigid beliefs regarding her purpose in life. She was given instructions the moment she was created, and she will go to any length to fulfill the role she was made for.
As highly as Jillian thinks of herself as a bio-weapon, she knows she's a lackluster human, taking up killing and consuming as a means of finding the "missing piece" she believes she's missing. That is to say, she eats people.