Ebina was originally born in Akita, but at the age of 15 she moved to Tokyo. She lives alone in the Yoshida Apartments, where Umaru and Taihei are residents as well.
Ebina is known to be very shy. Whenever she is shy or agitated, she reverts her way of speaking to her accent. Occasionally, whenever she receives a compliment she gets distracted. One of the compliments would be directed at her large busts, leading her to be self-consciousness and lost of self-confidence. But at times, she can be very cheerful.