One possible enemy could be a fire - powered villain. This villain wants to spread chaos and destruction with his fire powers, and Bella's ice powers are a direct threat to his plans. So, he constantly tries to eliminate her. Another enemy could be a group of power - hungry individuals who see Bella's ice powers as something they can use for their own evil purposes. They try to capture her and force her to use her powers for them.
Her enemies might include a sorcerer who believes that Bella's ice powers disrupt the natural balance of magic in the world. He wants to strip her of her powers. There could also be a jealous rival with water - based powers. This rival feels that Bella's ice powers are more impressive and gets in her way, trying to make her look bad in front of others who are also learning to control their powers.
In some fanfiction, an ancient ice - dragon could be her enemy. This dragon sees Bella as an intruder in the realm of ice powers. It believes that only it should have the right to control ice. So, it attacks Bella whenever she tries to use her powers. Additionally, a shadowy organization that wants to control all superpowers might target Bella because her ice powers are difficult to counter and they fear she could be a threat to their plans.
One interesting storyline could be Bella discovers her ice powers in a moment of great danger. For example, she's in a forest and a wild animal is about to attack her. Suddenly, her ice powers manifest and she freezes the area around the animal, saving herself. Another could be that she joins a group of superpowered individuals and uses her ice powers to help them fight against an evil force that is melting the polar ice caps. She uses her powers to create ice barriers and weapons to combat the enemy.
She might discover her powers accidentally. For instance, she could be in a moment of extreme danger or stress and suddenly find herself using the power without even realizing it at first.
If the fanfiction has a more community - based setting, neighbors could be supporting characters. An elderly neighbor might share their own stories of recovery from an injury, giving Bella hope. A neighbor who is a cook could bring over home - made meals to help her during the time when she can't move around much. And perhaps there's a young neighbor who looks up to Bella and tries to cheer her up by drawing pictures for her or reading stories to her while she's recovering.
I'm not sure of a specific fanfic on this. But you could start by looking on fanfiction.net or Archive of Our Own. Just search for 'High School DxD Issei ice powers' and you might find some great reads.
You can start by looking on popular fanfiction platforms like Archive of Our Own (AO3). There are often search filters that allow you to specifically search for stories with the 'Adrien has ice powers' theme. Another option is Fanfiction.net, which also has a large collection of Miraculous Ladybug - related fanfics. Just use the search bar and type in relevant keywords like 'Adrien', 'ice powers' and see what comes up.
One possible plot could be Naruto using his spider powers to create webs and swing around the Hidden Leaf Village for faster transportation. He might also use the webs to trap enemies during battles, just like how a spider catches its prey.
A Danny Phantom ice powers fanfiction could explore how his friends react to his new power. Sam and Tucker might be both amazed and a bit worried. They could help Danny test his powers in a safe environment, like an abandoned warehouse. And Danny might use his ice powers to create cool (pun intended) sculptures for fun, but also discovers that the power has a deeper connection to his family's ghostly heritage.
One possible plot could be Bella's journey through the ACL surgery recovery. It might start with her initial fear and uncertainty before the surgery. Then, during the recovery process, she could face challenges like physical therapy. Her friends and family, maybe even some of her Twilight friends if it's in that universe, would be there to support her. She might struggle with not being able to do the things she used to do easily, like running or dancing, and the fanfiction could detail how she overcomes these obstacles and eventually makes a full recovery.
Voldemort's remaining followers could be her enemies. They might be planning something new and Hermione, as a spy, would be trying to stop them. Also, some corrupt Ministry of Magic officials who are up to no good. They would see Hermione as a threat to their secret operations.
A more interesting plot twist could be related to the origin of these powers in the fanfiction. Maybe it's not just a random occurrence. There could be a hidden connection between Tatsumaki's world and Izuku's world. For example, some ancient prophecy or a secret experiment by an organization that spans across different anime universes. This discovery could change the whole dynamic of the story as Izuku has to not only master his powers but also figure out the mystery behind them.