Nista was friends with Anskye. One day, Nista was carrying groceries home, when Anskye (painted invisible) scared her and made her drop her shopping. This made Nista angry, and she told Anskye that people would not like him anymore if he kept on playing tricks.
From the picture with the story, it seems as though Nista is a green Ruki. She appeared in issue #17.
