Hinata could be another common character. Her gentle and shy nature provides an interesting contrast to the idea of her suddenly having significant muscle growth. It could be a story where she discovers a hidden power within herself that not only gives her confidence but also causes her muscles to develop as she becomes a stronger ninja.
Tenten is also often seen in these fanfictions. Given her focus on weaponry and physical combat skills, it's not a stretch to write a story where she gains muscle. Maybe she finds a magical weapon that, when she wields it, starts to transform her body, making her muscles grow and enhancing her fighting abilities.
Antagonistic characters are also present. They might be those who oppose the female character's transformation, either because they feel threatened by her new - found strength or because they uphold traditional gender norms. For example, a male colleague who tries to undermine the main character as she becomes more muscular and confident.
One common theme is empowerment. The female OCs with muscles often break the traditional gender norms in the Naruto universe. They show that females can be strong and capable fighters, not just in terms of ninjutsu but also physically.
One common factor is consistent training. Whether it's lifting weights, doing bodyweight exercises or resistance training, regularity is key. Another is diet. A diet high in protein helps in muscle repair and growth. For example, many women in muscle growth stories include sources like chicken, eggs, and beans in their diet. Also, proper rest is crucial. Muscles grow during the recovery period, so getting enough sleep and allowing time between intense workouts is important.
Another storyline might involve a female character being experimented on by a rogue ninja group. Instead of it being a negative thing, she manages to turn the tables and use the forced muscle growth to her advantage, becoming a powerful force in the Naruto world. This could involve her having to learn how to control her new body and deal with the reactions of her friends and comrades.
Hinata is often a common character. Given her long - standing feelings for Naruto in the original series, it's easy to incorporate her into an Anbu Harem scenario. Sakura can also be a part of it. She's a strong female ninja, and her relationship with Naruto in the canon can be tweaked in the fanfiction to fit the harem concept. Ino is another possibility. She has her own charm and skills, and in a fanfiction setting, she could be attracted to Naruto within the Anbu context. Also, some original female characters created specifically for the fanfiction might be included to add more variety to the harem.
Obviously Naruto himself is often the main character as it's about his muscle growth. Sasuke can also be involved, perhaps as a rival who is both impressed and a bit envious of Naruto's new - found physical power.
One common theme is intense training. Naruto often goes through rigorous training regimens in these fanfics that result in his muscle growth. Another theme could be a new power or transformation that is linked to the muscle growth, like a new form of chakra that physically changes his body. Also, some fanfics might have a theme of rivalry driving Naruto to build muscle, such as trying to outdo Sasuke in strength.
Often, there's a theme of revenge or justice. A character who has been wronged in the past uses their new - found muscle growth to seek revenge or to bring about justice. For example, in a crime - fighting fanfiction, a victim of a crime who experiences muscle growth decides to take on the criminals who once made their life miserable.
One common theme is empowerment. When a female character experiences muscle growth, it often represents her becoming more powerful and in control of her life. For example, she can now defend herself or others better.
Love is a common theme. Many fanfictions focus on the romantic relationships between female characters and male characters like Naruto or Sasuke. Another theme is power - up. Writers often give female characters new abilities or enhance their existing ones. For example, Sakura might get a new type of medical jutsu. Also, friendship among female characters is explored, like how Hinata and Sakura might become closer friends in some fanfictions.