Nikki Tressler is the eldest sister of the Tressler Vampire siblings. Although they are not related by blood, they all share the same maker; he isn’t in the picture at the moment and left Nikki in charge of her younger siblings. However, Nikki isn’t too concerned with playing babysitter, although she did manage to convince Victoria’s Legion to allow them to share the school’s lower level as their home. She is stubborn, impatient, and often childish, despite being a vampire much longer than her siblings, but it may be time for her to amp up her maturity.