One common theme is growth. Both characters are often shown to grow as individuals and in their relationship with each other. For example, Mori Jin might learn more about patience from Mira, and Mira could learn about taking risks from Mori Jin.
One idea could be to cross Mori Jin with a character from a different anime like Naruto. Mori Jin could end up in the Naruto world and have to deal with different jutsus and the ninja way. He might even teach some of the ninjas his own martial arts skills.
Light Yagami from Death Note. It would be a contrast in characters. Mori Jin could find himself in the world of the Death Note and try to stop Light's plans, or they could form an unlikely alliance where Mori Jin tries to change Light's view on justice while also dealing with the power of the Death Note.
One great Mori Jin x Mira fanfic is 'The Adventure Together'. It really delves into their relationship and how they support each other during different challenges. The story has some really interesting plot twists and great character development for both of them.
The gods might be outraged. They could see Percy as one of their own, especially since he has done so much for them. They might immediately seek to punish the abuser. For example, Zeus could send a bolt of lightning towards the person who abused Percy.
The ten sword gods under Jin Yong's pen included the sword god Zhuo Bufan, Xue Yiren, Ye Gucheng, Yan Nantian, Dugu Qiubai, Ah Qing, Zhang Sanfeng, Feng Qingyang, Yang Guo, and Linghu Chong. Among them, Ancient Dragon occupied six spots, Jin Yong occupied four spots, and Jin Yong's characters took the first and second place. These sword gods displayed extraordinary swordsmanship and combat skills in Jin Yong's novels, becoming existences that were praised and worshipped in the martial arts world.
Takashi Mori is likely an author who writes science fiction. However, without more context, it's difficult to provide detailed information about his works. There could be many relatively unknown authors in the vast world of science fiction.
Well, some past gods might be amused. They'd see these modern interpretations of their stories and characters in the Percy Jackson fanfiction as a strange yet interesting new form of worship or at least attention. For example, Zeus might be a bit irked at some of the liberties taken with his character, but also secretly flattered that people are still so interested in him.
Initially, Naruto would be heartbroken. His friends and his village mean everything to him, and the thought that the gods, who are supposed to be just, have turned against him would be a huge blow. However, he wouldn't give up. He would use his determination and his unwavering belief in himself. He might start looking for allies among those who are also disillusioned with the gods or who believe in his innocence.