Seikapoid is Nukude's third Utaloid other than himself, Nukupoid. Technically his fourth but Nukupoid is the Utauloid representation of Nukude and so are one in the same.

Seikapoid is sometimes referred to as Seika, she tends to act motherly and sweet, especially around Yuyupoid. She is considered an older sister by Yuyupoid, and a younger sister by Reikipoid.

She is very well mannered and sometimes takes charge of things, she does not let much overpower her. She is sometimes very scary though she never seems angry.

She enjoys reading books in her spare time.