Mahri is the little sister of Rudy, the Gym Leader of Trovita Island. When Misty saved her, Rudy expressed gratitude. Mahri, seeing a potentional love interest of Rudy, invited Misty to stay at the Gym, since she does not have much girls to play with. Misty reconsidered the offer, but refused once Ash had his match with Rudy.
Mahri had a Seel that was in trouble with Mahri, since they were near a whirlpool.