Ui Chigusa

She is older twin and her sister father is a veterinary doctor and they help their father in the clinic. She and her sister appeared in episode 4. Ui Chigusa is voiced by Kozue Yoshizumi

Appearance
Ui has her very loose ponytail and square 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.