Bunnie might be a bit more hands - on in her interactions with Tails. She could help him with any physical tasks or repairs he needs for his inventions. Sally would interact in a more cerebral way. She would encourage Tails to think deeply about the implications of his creations. And Tails would be excited to show off his knowledge and skills to both of them, while also learning a great deal from their different perspectives.
Bunnie would probably be very protective of Tails. She might use her robotic parts to keep him out of harm's way. Sally, on the other hand, would be more of the nurturing type. She'd likely engage Tails in conversations about his inventions and ideas. Tails would look up to both of them, asking Bunnie about her mechanical abilities and Sally about her leadership skills.
One possible plot could be that Bunnie and Sally have to babysit Tails while Sonic and the others are away on a mission. Tails might be a bit of a handful as he's so curious and intelligent. Maybe he tries to build some crazy invention during the babysitting time and gets into a bit of trouble. Bunnie and Sally would then have to use their wits to keep him safe and out of danger.
Often, Jeff will be very protective of Sally. He might use his violent skills to keep her safe from other threats in their dark world. Meanwhile, Sally can bring out a softer side of Jeff that no one else has seen. For example, she might get him to talk about his past or his feelings, which he usually keeps bottled up. Their interactions can range from tense and fearful to surprisingly gentle and caring as the story unfolds.
Well, Harry could use his magic to try and communicate with the Ten Tails. Since he has a connection to the magical world, he might be able to find a way to reach the Ten Tails' consciousness. Hermione, on the other hand, would probably study ancient magic texts to figure out more about it.
Probably Percy. Since he's her son in the original series, he would surely interact with her a lot in the fanfiction.
Naruto would probably be really curious about Percy's world. He might ask a lot of questions about the gods and the demigods. Percy, on the other hand, would be cautious at first because of the huge power Naruto has with the Ten Tails. But once they start talking, they could find common ground in their experiences of having to fight against powerful enemies.
Well, in a lot of Tails and Sally fanfiction, the theme of growth is present. They grow as characters, learning from their experiences with each other. Another common theme is loyalty. They are loyal to each other and to their friends in the Sonic gang. There's also the theme of facing challenges. Whether it's a new villain or a difficult situation, they face it head - on in these fanfictions, and through that, their relationship deepens.
One common theme is friendship. They often go through various challenges together which strengthens their bond.
In fanfiction, Metal Sonic often interacts with Tails as an adversary. Since Metal Sonic is usually programmed to oppose Sonic, and Tails is Sonic's friend, Metal Sonic sees Tails as an obstacle. For example, he might try to attack Tails to get to Sonic or to stop Tails from helping Sonic in a fight.
One common theme is friendship. Tails and Aunt Sally often support each other through various challenges in the fanfictions. For example, in many stories, when one is in trouble, the other comes to the rescue.
There are indeed some. Check out platforms like FanFiction.net. In these stories, Tails and Sally's relationship can be explored in different ways. Maybe they start as friends and gradually develop deeper feelings. Some fanfictions might also put them in alternate universes where their roles are a bit different from the original Sonic lore.