Koi Chigusa

She and her sister father is a veterinary doctor and they help their father in the clinic. She and her sister appeared in episode 4.

Koi Chigusa is Voiced by Natsuko Kuwaya.

Appearance
Koi has a braid and round glasses.

Role in Plot
Nozumu Futami meet them when he takes Billy to the vet clinic after he ate a fax addressed from the Sumireko Ichijō and Kaoruko Ichijō to Nozomu which got it stuck in his throat.

Trivia

 * She and her sister are in third year in high school.