We could expect to see Natsu encounter different magical creatures and environments during his 10 - year trip. He could be in a land full of ice - based magic and have to adapt his fire magic to survive. This would lead to some really interesting battles and power - up moments for him. And of course, he might come across some lost or hidden magic spells that he could bring back to Fairy Tail.
Happy is almost always there. He's Natsu's loyal sidekick and provides comic relief as well as support during training. Lucy also frequently appears. She might offer some strategic advice or just be there to cheer Natsu on. Erza is another common character. Given her strong and strict nature, she could be the one pushing Natsu to his limits during training.
One popular natsu training trip fanfiction might be 'Natsu's Epic Training Adventure'. It could detail his growth in strength and new magical abilities he discovers during the trip.
Well, perhaps Natsu could return with new and powerful fire - based magic skills. He might have faced some really tough opponents during the 10 - year trip and learned how to overcome them. This could make him even more of a force to be reckoned with in the Fairy Tail guild.
One common theme is Natsu's growth in power. In these fanfictions, he often overcomes challenges during training that make him stronger for future battles. Another theme could be his relationships. Training might strengthen his bonds with his guildmates as they support or train with him. For example, his friendship with Gray could develop as they spar during training sessions.
Well, he could meet some old friends or foes. Maybe he runs into an old enemy who has also been training and they have a rematch which pushes Natsu to new limits. Or he meets an old friend who gives him some valuable advice on how to control his magic better during this trip.
The 1v2 training concept referred to the method of a personal trainer guiding two clients at the same time during the training process. We can get some information about the personal trainer's 1v2 training method. First of all, the coach needed to spend time listening to each client's fitness needs and develop a customized training plan based on individual differences. Secondly, setting clear training goals could improve the effectiveness of training. In addition, personal 1v2 training could increase the interaction and sparring between students, thus improving the training effect. However, since most of the search results provided had nothing to do with fitness training, it was impossible to provide more specific information.
I'm not sure who exactly Natsu is just from 'natsu reads fanfiction'. It could be a normal person who just enjoys reading fan - made stories. Maybe it's a nickname for someone within a particular fan community.