It could be Naruto himself who discovers and uses the Katon Hijingakure no Jutsu in the fanfiction. Since he's always exploring new jutsus and pushing his limits.
One creative use is turning the bubbles into mini - prisons. In some fanfictions, Naruto can trap enemies inside the bubbles, which are then made unbreakable. This is a really cool and unique way to use the jutsu.
One common theme is loyalty. Since Chiriku is part of the Naruto world, many fanfics explore his loyalty to his village and comrades. Another theme is the search for power. As a character, he may be on a quest to gain more strength or master new jutsus.
One scenario could be during a large - scale battle. Naruto sees his friends getting injured left and right. He uses his medical jutsu to quickly heal their wounds and get them back into the fight. Another could be when he's on a solo mission in a remote area and he himself gets injured. His medical jutsu allows him to treat himself and continue the mission.
There might be a fanfic named 'The New Application of Sexy Jutsu'. Here, Naruto discovers that by using the Sexy Jutsu seriously, he can manipulate certain opponents who have a weakness for such distractions. It shows his growth in using his unique skills in different scenarios.
Well, in some fanfics, the interesting plot point could be that Naruto uses the Sexy Jutsu to infiltrate an enemy base. Since the guards are distracted by the jutsu, he can easily gather intelligence. It's a different way of using the jutsu compared to the original series where it was mostly for comical purposes.
The fanfic could start with Naruto having a strange dream about using Wood - Style Treant Jutsu. He wakes up curious and starts to experiment. He finds that he can transfer his own emotions into the treants, making them more aggressive or defensive depending on how he feels. As he gets better at it, he uses the jutsu in a major battle against a group of rogue ninjas who are terrorizing a village. His treants become a symbol of hope for the villagers as they fight off the invaders.
He might be initially shocked and confused. Since Naruto is not used to having someone else's mind in his body, he could struggle to control his actions at first.
One popular 'naruto chiriku fanfic' could be 'Chiriku's Adventure in the Hidden Leaf'. It often explores Chiriku's unique abilities and his interactions within the Naruto universe. Another might be 'Chiriku and the Forbidden Jutsu' which delves into his discovery of a powerful and long - forgotten jutsu.
A 'Mana - Clone Jutsu' could be possible. These clones would be made of mana instead of chakra, and they might have different properties. For instance, they could be more durable or have the ability to explode on contact, sending out mana waves that disrupt the opponent's own mana or chakra.