Monobaku and Nijibaku are learning A.I. in the form of bipedal tapir sisters. Their primary roles are to care for and ensure the safety of the students whilst they are on the premises of Seigi Academy.  They have control of most everything inside of the school and use this to protect their class. they assume a teacher-like role despite the fact that they are just school mascots, but have good connections with the students.

Nijibaku's voice should be very high and playful, probably with a childish tone as she tries to bring joy to her classmates. She should sound more female than male, though this does not mean that men are not welcome to audition for the part at all. Monobaku, being the darker of the sisters, does not need to sound entirely malicious, as the voices should sound similar, though should be distinguishable. The best way to do this may be to toy with pitch. Improvisations to test the distinguishable differences are 100% welcome.

By popular demand, the canon voice that they are most similar to is Monomi.