Well, first off, Happy has to be a really popular supporting character. Happy is Natsu's best friend and sidekick. In stories about Natsu growing up, Happy is there every step of the way, providing comic relief and also being a source of motivation for Natsu. Another popular one is Wendy. As a young and talented mage, she can be a symbol of new hope and growth in the guild. In fanfictions, she might team up with Natsu more often as he grows, and they can learn from each other. And then there's Makarov. The guild master is an important figure. He has a lot of wisdom to offer Natsu as he grows, and his leadership and care for the guild members, including Natsu, are often explored in these fanfictions.
Lucy is often a common supporting character. She's Natsu's close friend and partner in many adventures in the Fairy Tail world. She would likely be there to support Natsu during his pregnancy, offering her friendship and maybe some practical help. Gray is another one. Despite their rivalries, he would probably step up to support Natsu. And of course, Erza. With her strong and protective nature, she would be a great source of support for Natsu during this time.
Mirajane is a popular choice too. She has a mysterious side to her, and in the fanfictions, she could use her unique abilities to help Natsu or be involved in the events that the Fairy Tail members are watching. Also, Laxus might be included. His powerful magic and complex character can add depth to the fanfiction stories, especially when his relationship with Natsu and the rest of the guild is explored.
Some of the key themes in Fairy Tail Natsu growing up fanfictions are his self - discovery. Natsu is a character full of energy and impulsiveness in the original series. In fanfictions about his growth, he starts to understand himself better. He realizes his strengths and weaknesses not just in terms of his magic but also as a person. For example, he might learn how his hot - headed nature can sometimes be a hindrance and how to control it. Additionally, themes of love can also be present. Whether it's a budding romance with another character or his love for the Fairy Tail guild as a whole, it plays a part in his growth journey.
Obviously, Natsu is a very popular character as it's in the title. He is often the center of many fanfictions. Lucy is also quite popular as she has a close relationship with Natsu in the original series. Their dynamic often plays a big part in fanfictions.
There are several important supporting characters. Levy is one. Her knowledge of books and magic could assist Natsu in his rule, especially when it comes to understanding the history and secrets of the academy. Cana could be important too. With her card magic, she might be involved in predicting events or providing strategic advice. And Loke, as a powerful celestial spirit, could be a valuable ally for Natsu when facing tough challenges within the academy.
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.
Lucy is definitely one of the most common. She has a close bond with Natsu from the start of the series. Erza is also often included. Her strong and confident personality makes her a great addition to the harem. Wendy could also be part of it. Despite her young age, she has a deep respect and admiration for Natsu.
Obviously, Natsu himself is a central character. He is the main attraction in the harem scenario. His fiery personality and powerful magic make him a key figure. Then there's Lucy. She is often included in the harem as she has a strong bond with Natsu in the original Fairy Tail series. Her celestial spirit magic also adds an interesting element to the fanfiction. Happy, the blue flying cat, is also popular. He can provide comic relief and also plays a role in the adventures, especially when it comes to helping the children in the story.
Jellal is often an interesting supporting character. His complex relationship with Erza can be explored further in fanfiction. He might play a role in helping Erza in a difficult situation or be a source of internal conflict for her. Another one could be Mirajane. She could offer her support to Erza in a new and different way compared to the original series.
Natsu is often a very popular character in Fairy Tail Empire fanfiction. His powerful fire magic and his brash but endearing personality make him a great protagonist in many stories.