Gladion (anime)/Character

When Gladion first appeared, he was distant from his sister because he blamed himself for why was unable to touch Pokémon. He is shown as being impatient, as seen in Revealing the Stuff of Legend!, when he demanded the guardian deities hurry up as they waited to save his mother. He has shown to have a temper as seen in Mission: Total Recall!, when he harshly scolded Ash for accidentally causing Lillie's traumatic fear of Pokémon to resurface due to his negligence with Nebby. Despite this, Gladion quickly recognized Ash's potential as a Trainer, and after defeating Ash's Lycanroc in A Masked Warning!, thanked Ash for giving Silvally an opportunity to train. He was also motivated to take the island challenge after seeing Ash and perform. When he first saw for the first time, he quickly put up his guard around it due to the fact that Poipole was an Ultra Beast.

As shown in SM105, Gladion has a faith in his Pokémon to let them battle each other to train, without giving them any kind of command. He also showed that he is happy whenever his Pokémon does well, as shown when he bumped his hist with one of his Lycanroc's fists after it defeated Ash's Lycanroc.