Ayano

Andrea is a character of the day who lives in Megi City on Yellow Rock Isle with her little sister Mika and their father. The whole family appeared in A Corsola Caper!.

Andrea helps out her father in the family business of collecting Corsola horns to make jewelry. One day, when an over-excited Corsola stumbled across the family, it inadvertently scared off the other Corsola. As a result, the family's home, which rested on top of a Corsola colony, floated away with Mika.

With the help of Ash and his friends, Mika was saved. After relaying their story, Ash decided to help find the missing Corsola. With his help, all the Corsola were safely found. The Corsola who scared off the others was caught by Misty.

She reappeared in a flashback in Espeon, Not Included.

(Source: Bulbapedia)