No last name given. One of the artists at the Ashfield Community for the Arts.
Anaïs is one of several artists that Jane encounters during her stay at an artist's colony. Anaïs has no lines, and we therefore don't learn much about her. She has bright pink hair cut short.
(Note: Assuming Jane was introduced to her housemates in right to left order, Anaïs is the girl described above. She is not actually referred to directly by name at any point.)