And I've got a feeling about nel training our body to suit her needs so that eventually she'll end up stealing our body betraying us I have a question how can I train our character's body to get stronger against nel
Nel herself offers some training, and additional training with Nel can be accessed via interactions with Glace and Vivi. You can also visit the Mystic Fox Shrine at the Hot Springs in order to harden your body outside of Nel's control.