>>53088738Ash and Serena both have similar core values as people. In other words, their behaviors, motivations, and actions can subconsciously end up being the same. Here are a few examples:
They put others before themselves - Ash and Serena are both very selfless individuals. There are many instances where Ash or Serena steps in to help out a person or Pokémon in need. For Ash, there are multiple instances of this across the anime's history. From protecting Pikachu from the wild Spearow in the very first episode, to helping out other abandoned Pokémon like Charmander and Chimchar, and even gaining the trust of his Charizard, Ash has shown that he puts his friends before himself multiple times. For Serena, she goes in mud in XY021 to save her Fennekin, she offers to stay back and watch over Bonnie in XY036, she risks her chance of skipping a performance round in favor of finding her lost Eevee in XY091, Serena comforts Eevee the night before its first performance in XY101, and she offers on her own to help Mairin find Chespie in XY133. Both Ash and Serena are able to put others before themselves, and it shows that they feel strong empathy to the ones around them.