Prior to the start of the series, Charizard used to be under the ownership of Kiawe's grandfather.
With Kiawe
Ever since Kiawe's grandfather gave Charizard to his grandson, Kiawe has used it as transport, usually from his home on Akala Island, to Melemele Island, in order to attend the Pokémon School. He also uses it in his job of delivering his families own dairy made products to places on Akala and other islands in Alola.
Personality and characteristics
Charizard has shown to be a very relaxed Pokémon. In Alola to New Adventure!, Charizard chose to sleep where it was, whilst Kiawe and his Turtonator battled Tupp, Rapp, and Zipp. Although it's a usually calm Pokémon, it was shown to be angry before Kiawe battled the Team Skull Grunts, when they said that they wanted to take Charizard for themselves. In the same episode, despite wanting to sleep, it perked up after Ash brought up the fact that he just spotted Tapu Koko.