Mei

Mei, named by Kari is Kari's partner and guardian. She was given to Kari as a gift from Koga after Mei chose Kari as her owner after taking a liking towards her and promises to protect her. She becomes a major part of the story. She is loyal to Kari and decides in the end when reunited with Koga and Kari saying goodbye, to go with Kari choosing to live with her and Koga allows Kari to take Mei with her. In season 2, Kari is now a teenager and Mei is still her partner and is still loyal to her. She is the daughter of deceased parents: Godai and Miyumi who are also wolf yōkai

Personality
When introduced to Kari, Mei is a very sweet and caring wolf yōkai showing that she cared for Kari and chose to be with her. Mei enjoys tummy rubs which was revealed when Kari rubbed her tummy. She is loyal to Kari and her partner, Gatomon, and the Kamiyas' cat, Meiko. Mei stays as Kari's guardian and partner even when she grows up and she decides to never leave Kari's side.

Kari & Friends Meet InuYasha & Kagome
Mei is first seen traveling with her pack with its leader Koga. When Kari came up to her, she took a liking to her and decides to become Kari's partner and guardian promising to protect her. Shen then leaves with Kari after Koga allows her to go with Kari.

Kari & Friends & The yōkai Thief
A human man is stealing yōkai and selling them for a profit. A cat yōkai that looks like Kilala, Sango's partner along with toad demon, and other small demon like weasels are trapped in a cage that he is tagging along. He then spots Kari & Mei and decides to steal Mei to sell her too. Kari is riding on Mei's back when the human man known as Hirofumi appears and demands Lord Sesshomaru to hand over the wolf yōkai. Kari tells him no way and the man decides to steal Kari and Mei because he sells human children for a profit too. He then tells Lord Sesshomaru to hand over both Kari and Mei. This pisses Lord Sesshomaru off while he fights to protect Kari & Mei from being kidnapped. When the man lunges at Kari, Mei gently puts her down and fights the man getting chained up and taken away by the man while looking at Kari sadly. Kari begs Lord Sesshomaru to help her rescue Mei and Lord Sesshomaru agrees taking Kari, Rin Jaken, & their friends with him. Mei is seen being shoved into a bigger cage while the man says he will get paid highly for her. Lord Sesshomaru, Jaken, Kari, Rin & their friends come running onto the scene with the other girls freeing the other yōkai from the smaller cage. Suzie frees the cat yōkai & her friends letting them go free safely. Kari freed Mei hugging her after she is released from the cage. Kari then tells Hirofumi no more stealing innocent creatures. Old-fashion looking human men come to arrest Hirofumi, while the young children that lost their yōkai friends thank Kari and her friends. Suzie is thanked by a small girl who was holding the cat yōkai that Suzie had freed telling her that she was glad that she had her partner, Suzuki back. Suzuki lets Suzie pet her and the children bid farewell going with their parents and Suzie asks what the little girl's name is and she replies that it's Sora. Kari then notices how little Sora has orange hair like their friend from the real world, Sora Takenouchi has and concludes that this Sora must be Sora Takenouchi's ancestor. Lord Sesshomaru then leads the girls, Mei, & Jaken on their next adventure.