Konoha

Verona is a character of the day who appeared in Promoting Healthy Tangrowth!. She is a Pokémon Ranger who watches over a forest near Lake Acuity.

Verona first approached Ash and Brock, warning them not to enter the forest because of a Tangrowth that uses Absorb. She offered to help them locate their missing friend Dawn, who had already gone into the forest after her runaway Mamoswine. During their search, the aforementioned Tangrowth attacked them and used Absorb on Grotle, sapping its energy. Strangely, after it took Grotle's energy, it left behind a Sitrus Berry to help it recover.

Verona eventually discovered that the energy Tangrowth was taking from the Pokémon was being used to help a dying tree. Tangrowth never meant any harm to the Pokémon, which was why it would leave behind either an Oran or a Sitrus Berry so that they would get better. After the tree became healthier, Verona decided to work with Tangrowth in order to protect the forest.

(Source: Bulbapedia)