It could be an older, more experienced android. One that has been through a lot and has a deep understanding of both the android world and human society.
Maybe a human detective. Since Connor often has to deal with human - related cases, a detective could mentor him on how to better interact with humans, understand their motives, and solve cases more efficiently. The detective could share his years of experience in the field, teaching Connor how to read people and pick up on subtle clues. This would be a great pairing as Connor could learn a lot from the detective's intuition and investigative skills.
There's a possibility that Connor's mentor could be a scientist. A scientist who was involved in creating androids. This scientist could teach Connor about his own programming, how he was made, and the potential he has. The scientist could also help Connor understand the ethical implications of his existence and actions, guiding him to make better decisions in the future.
Well, it could be that the mentor in 'Connor gets a mentor fanfiction' is someone with a lot of experience in a particular field that Connor is interested in. For example, if Connor wants to improve his combat skills, the mentor could be an expert fighter. The mentor could show Connor new techniques, and also help him develop strategies for different situations. This would not only make Connor stronger but also more confident in his abilities.
Maybe Kakashi could still be his mentor. Even though One for All is a new and different power, Kakashi is very experienced. He could help Naruto understand how to incorporate this new power into his overall combat strategy. Kakashi would be able to analyze the power and give Naruto advice on how to train with it while still relying on his ninja skills.
Makarov could be her mentor. He is the master of the Fairy Tail guild and has a vast amount of magical knowledge and experience. He could guide Lucy in exploring deeper aspects of her celestial spirit magic, teaching her how to better communicate with her spirits on a more profound level, which would in turn make her stronger when summoning and using their powers.
Maybe Dumbledore in a more in - depth way. In the original series, Dumbledore was somewhat mysterious in his teachings. Here, he could really focus on Harry's growth and give him proper training, perhaps in the art of divination and understanding prophecies better.
Sasuke could be her mentor. He has extensive knowledge of various weapons and his skills with bladed weapons are well - known. He could teach Naruko how to hold the tanto properly, the different stances for attack and defense, and how to use chakra with it for enhanced strikes.
In this fanfiction, Kakashi could also be Naruto's mentor in magecraft. Kakashi is known for his adaptability. He could start to study mage powers along with Naruto. They could learn together about new forms of magic, and Kakashi could use his combat experience to help Naruto understand how to use his mage powers in battle situations.
It could be Kakashi. Since Kakashi has a wealth of knowledge and experience, he might take Naruto on a secret training journey. He could teach Naruto some advanced sharingan - related techniques that Naruto can adapt to his own fighting style, even though he doesn't have the sharingan himself.
Well, it really depends on different fan preferences. Some might like a Connor who is a powerful fighter with unique semblance skills. For example, a Connor who can manipulate time in some way, like slowing it down during battles. This kind of characterization often makes for exciting action scenes in the RWBY fanfiction world.
A new villain could be introduced in the fanfic who is specifically out to get Connor Kenway. This villain might have a personal grudge against Connor or be on a mission to eliminate all the Assassins, and Connor becomes their prime target and ultimately falls to their schemes.
It could be Itachi. Even though Itachi has his own complex past, he is highly skilled in Anbu - like operations. He could show Naruto the ropes of the Anbu world, teaching him how to analyze situations quickly and make tough decisions that are often required in Anbu missions.