Rather than inappropriate content, one could write a fanfic about Mrs O'leary's family heritage. Perhaps she uncovers secrets about her ancestors and goes on a journey to learn more about her family's past. It would be a more respectful and interesting way to create a story about her.
A great alternative would be to write a story about Mrs O'leary's role in her community. Maybe she helps to organize local events, or she is part of a group that is trying to save an old building. This way, it focuses on positive aspects of her character and her place in society.
No. Writing sexual fanfic about someone is inappropriate and unethical as it violates a person's privacy and dignity.
A powerful Titan who was previously imprisoned but has now escaped could be a great antagonist. This Titan could have a grudge against Percy for his role in previous battles and sees Mrs. O'Leary as a way to get to him. He could use his own dark magic to try and control Mrs. O'Leary or turn her against Percy.
Another plot could be that Mrs. O'Leary gets lost in the mortal world, and Percy has to find her. Along the way, he discovers that she has made some interesting mortal friends who are in danger because of her association with the demigod world. Percy then has to not only find Mrs. O'Leary but also protect her new friends from the monsters that are after them.
You can start by looking on fanfiction websites like Archive of Our Own (AO3) or FanFiction.net. Just search for 'Percy Jackson Mrs O'Leary' on their search bars and you'll likely find a variety of stories.
One idea could be that Mrs. O'Leary gets lost in the mortal world and Percy has to find her without using his demigod powers. It would be a fun adventure as he has to rely on his wits and the help of some mortal friends.
A fanfic about Jessica Albert's friendship with other characters. Focus on the relationships, the emotional bonds, and how they support each other in various situations.
A friendship - centered fanfic would be great. Maybe Ariel shows Eric more about her underwater home, and they learn about each other's cultures. It can include details like Eric learning to communicate with the sea creatures, and Ariel learning about human music and art.
You could write about their friendship adventures, like how they explore a new city together or their experiences in a school project.
I'm not sure specifically which top stories he is associated with at the moment. Maybe it could be related to his business ventures, investment advice, or his opinions on the current economic situation.
I'm not sure specifically which top stories Kevin O'Leary has been associated with lately. It could be about business investments, economic trends, or his views on emerging markets. Maybe he has some insights on the latest tech startups or changes in the financial sector.