One idea could be to make the character with the lightning quirk have a fear of water. This would add an interesting dynamic as lightning and water don't mix well. They could struggle to control their quirk when near water, and it could be a source of internal conflict for them.
For the character development in a fanfiction with a lightning quirk, consider giving them a mentor who has a different type of energy - based quirk. This mentor could teach the character how to better focus and direct their lightning, as well as how to use it in more creative ways. Maybe they learn to use it for healing in small doses, which is an unexpected use of a typically offensive quirk.
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.
For a My Hero Academia OC with lightning power, you could start by thinking about their appearance. Maybe they have spiky hair that seems to crackle with electricity, like Denki Kaminari but more intense. Their costume could be designed with lightning bolt motifs and made of a material that can withstand their own electrical discharges. For the character's backstory, they could have been struck by lightning as a child and survived, which awakened their quirk. This event could also have led to them being a bit of an outcast, fueling their drive to become a great hero.
When writing action scenes for a character with a lightning quirk, describe the speed and intensity. For example, 'He shot out bolts of lightning, each one crackling through the air like a whip, their bright light blinding his opponents for a split second.'
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.
Well, he could be an OC with a healing quirk. In the fanfiction, he starts helping out injured students during training sessions. This catches the attention of several female characters. Some might see him as a valuable asset to their future hero teams, while others develop a more personal attraction. The harem could then be formed as these girls start competing for his attention in a friendly way, like trying to bring him the best lunches or inviting him to exclusive study sessions.
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.
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.
First, think about how the voice quirk affects communication. For example, it could be a voice that can hypnotize others or a voice that can shatter objects. Then, consider the OC's personality. A shy OC with a powerful voice quirk could have an interesting internal conflict. Also, think about how this quirk fits into the My Hero Academia world. Maybe the quirk is seen as dangerous and the OC has to hide it at first.
The OC could start as a shy and withdrawn character, afraid of their psychokinesis quirk. But as the story progresses, they gain confidence. For instance, at first, they might accidentally break things with their quirk and be scared, but later they learn to control it and become more self - assured.
One idea could be fusing Bakugo's explosion quirk with Todoroki's ice quirk. Imagine a hero who can create explosive ice shards. It would be a visually stunning and powerful ability. Another could be fusing Uraraka's zero - gravity quirk with Midoriya's One For All. The hero might be able to make objects weightless and then send them flying with super strength.