Masaki is a main character in Mayoiga who is one of the passengers on the bus to Nanakimura. At 17 years old, she's an earnest and curious student with a slight dislike for mysterious young ladies. Despite her odd beliefs about seeing or sensing things in the future, Masaki has never directly demonstrated this ability in any episodes. She can be emotional and have sudden outbursts, like asking Mitsumune if she was "crazy" in episode 1. Additionally, Masaki experiences motion sickness.