It could be a bit rocky at first. Ash may have seen and done things in the war that have changed him. Serena will need to adapt to this new Ash. But if they communicate openly, their relationship can grow stronger. For example, if Ash has post - war trauma, Serena's support can help him heal, and this shared experience will bring them closer.
Their relationship could become deeper. Ash has been through a war, and Serena's support during his return would make their bond stronger. They might be more reliant on each other.
Well, perhaps Ash comes back with new skills and a sense of purpose. He might be determined to protect Serena even more than before. In the fanfiction, he could use his war - learned strategies to deal with any threats that come their way. And their relationship could evolve into a deeper, more mature love as they face new challenges together.
Their relationship might start off with a lot of pent - up emotions. Ash could be a bit distant at first due to his war experiences, but Serena's love and care would gradually draw him out. Eventually, they would become closer as they share their feelings and experiences during the time they were apart.
Well, perhaps Ash returns physically but is emotionally scarred. Serena would be there to comfort him. They could start by just reminiscing about old times. Then, Ash might introduce Serena to some of his war - time comrades who are also Pokémon trainers. This could lead to a whole new set of storylines involving group adventures, Pokémon battles, and the rebuilding of relationships that were strained during the war.
Well, it could start with Serena being initially shocked but then finding it hilarious when Ash crossdresses as her. This shared moment of laughter can bring them closer. They might start to have more open conversations about their dreams and fears. For example, Ash could share his insecurities about always winning battles, and Serena could comfort him in a new, more intimate way because of this unique situation.
Their relationship would become more mature. They would have to rely on each other more than ever. With a baby, they'd have to share responsibilities, which could lead to a deeper understanding and respect for each other.
She could be overjoyed at first. After all, she might have been worried sick about him during the war. However, she may also be a bit hesitant. The war could have changed Ash in ways she doesn't understand yet.
His best friend from before the war could be a main character. This friend might have been waiting for Ash's return and now has to deal with the changed Ash.
Through shared experiences like traveling to new places. For instance, if they go to a snowy region, they can help each other adapt to the cold and take care of their Pokémon in the new environment. This mutual support can bring them closer.
Their relationship could develop romantically. After the reunion, they might start to realize their feelings for each other more clearly. For example, they could share more private moments, like watching the sunset together while their Pokémon play nearby.