My Hero: Quirk Evolution

One cool quirk idea could be 'Shadow Mimicry'. The user can blend into any shadow and move freely within the shadow realm, also being able to mimic the actions of those whose shadows they are in. It gives a lot of stealth and surprise attack possibilities in a fanfiction.

First, consider their motivation for using the Copy Quirk. Are they using it to become the best hero? Or maybe to prove themselves to someone? For example, if they want to be like their idol hero, they might copy only the quirks of that hero at first. Then, think about the limitations of the quirk. Maybe they can only copy a quirk for a short time, so they have to strategize when to use it. This would force them to study different quirks and opponents carefully.

One idea for a Deku's Quirk fanfiction could be exploring what would happen if Deku's quirk manifested in a different way. For example, instead of having to gradually control One For All, he suddenly has full mastery from the start. This could lead to a very different story arc where he is immediately seen as a top - tier hero - in - training, causing envy and admiration in equal measure among his classmates.

One idea could be a fanfiction where Deku's quirk suddenly mutates. Instead of just having One For All, he starts to develop an additional power related to it, like the ability to share a fraction of One For All's power with his friends temporarily to boost their own quirks in a time of great need.

Use descriptive language to bring the quirk to life. When Deku uses his quirk, don't just say he punches harder. Describe the energy coursing through his body, the sound it makes, and the impact it has on the environment. For instance, 'As Deku activated One For All, a brilliant green light enveloped his fist, crackling with raw power. With a thunderous roar, he launched his punch, sending shockwaves through the concrete, shattering it into a million pieces.' This will make your fanfiction more immersive for the readers.

The 'Plant Symbiosis' quirk would be a great addition to a fanfiction. The individual with this quirk can form a symbiotic relationship with plants. They can communicate with plants, make them grow rapidly, and even use plants as an extension of their body for things like creating shields or lashing out at enemies. This quirk could bring a whole new element of nature to the story.

One great Izuku fanfiction is 'A Different Path'. In this story, Izuku gets a quirk that's not One for All but something entirely unique. It shows his journey of self - discovery and how he still manages to be a hero in his own way. The author does an amazing job of exploring Izuku's character and his relationships with other characters like Bakugo and All Might in this new scenario.

Authors can start by giving the character a unique appearance. For a demon quirk, it could be horns or red eyes. Then, they should give the character a complex personality. Maybe the character is shy because they're afraid of being judged for their quirk. Also, give the character some flaws related to the quirk, like it drains their energy too quickly.

You can also combine different concepts. Maybe Izuku has a quirk that is a mix of telekinesis and heat generation. He could move objects with his mind while also heating them up, creating a powerful offensive and defensive ability. This would require him to train hard to control both aspects of his quirk effectively.

One interesting concept could be seeing how characters adapt to new quirks. For example, if Midoriya had Bakugo's Explosion quirk, his usually timid nature might contrast sharply with the aggressive nature of the quirk. He would have to learn to control his emotions in a different way to master it.