One way could be through communication. If ichika and the female characters start talking openly about their issues and misunderstandings, they might be able to resolve their differences.
A character development arc for ichika could be designed. He could gradually learn to understand the female characters better through new experiences or interactions. For example, he might be forced to work with a female character on a common goal, and during this process, he discovers that his initial hatred was unfounded. Another option is that the female characters could also change their behavior towards ichika. If they start showing more respect and kindness, it might soften ichika's stance.
Perhaps in the fanfiction's universe, ichika has been misjudged by female characters repeatedly. They might assume things about him without getting to know him properly, like thinking he is a threat when he is actually trying to help. This constant misjudgment can build up negative feelings and eventually turn into hatred.
They could have an honest conversation. Just sit down and talk about their feelings and misunderstandings. This simple act can clear the air and resolve the hatred.
Communication is key. They could sit down and talk about their misunderstandings. Once they clear the air, their relationship might improve.
If the sister has caused problems for Yuma in the fanfiction, she could make amends. For example, if she broke his card, she could find a way to replace it or help him get a more powerful card. This act of kindness might make Yuma change his feelings towards her.
The author of the fanfiction could rewrite it to better align with the characters' personalities. For example, by making Percy more in - character and the high school setting more unique.
Alexis could also try to engage in discussions with other fans of Beckett. By sharing her/his views, Alexis might gain new perspectives and either change her/his mind about fanfic in general or at least find a subset of fanfic that she/he can tolerate.
One way could be for the writer of the fanfic to rewrite Brick's character to be more palatable to Blossom. Maybe make him more heroic or less antagonistic.
It can divide the fandom. Some fans who love the original Naruto character and his relationships with female characters might be really put off by this trope. They see Naruto as a character who respects and values all people, regardless of gender.
One possible plot could be that they meet in a very unexpected place, like at a music concert where Ichika is performing and Laura is in the audience. They lock eyes and it's like an instant connection. Then they start to get to know each other gradually over shared interests such as a love for art. Eventually, Ichika realizes he can't live without Laura and proposes.
His character could become more mature. Facing the situation of the pregnancy, he would have to grow up quickly. He might learn to be more empathetic towards the girl's situation, understanding the physical and emotional challenges she is going through. Also, he could become more decisive as he has to make choices regarding their future and the future of the child. For example, he would need to decide whether they should keep the baby or not, and how they would support it if they do. All these experiences would shape his character in the fanfiction.