It could be a character from a completely different dimension. Suppose there's a crossover element in the fanfiction. A character from another anime or fictional universe somehow ends up in Ichigo's world after his revival. This character has different abilities and a different perspective, and they see Ichigo as a potential ally against a common enemy that exists in both of their worlds.
An unexpected ally could be an old enemy from his past. Maybe a Hollow that he once fought and defeated now sees a greater threat in the situation after Ichigo's revival and decides to team up with him. For example, the Hollow might have information about the new forces that are emerging since Ichigo's return and offers to share that in exchange for some form of protection or mutual benefit.
I think his family would be the first to help. His sisters could bring him cold compresses to reduce the fever, and his father would use his medical skills. And from the Soul Society, Renji might come to check on him, as he and Ichigo have a sort of friendly rivalry. He would want to make sure Ichigo gets better soon so they can have their next sparring match.
A little mouse in the maze could be her unexpected ally. It might know all the secret passages and hidden corners of the maze and could lead her to safety or important clues.
Ichigo would also experience a period of sadness. He values his relationships, and when one is broken through betrayal, it would hurt him deeply. He might isolate himself for a while, brooding over what happened. But ultimately, he would use this experience to become stronger. He'd learn from it and be more cautious in future relationships, while still maintaining his core values of loyalty and trust.
It could be an unknown villain who has a special ability to hypnotize. This villain might be targeting Ichigo because of his power.
One possible scenario could be that Ally trips and falls during a performance. Maybe she misses a step on the stage while singing and lands awkwardly, hurting her ankle. This would cause chaos during the show as Austin and the others rush to her aid.
Maybe an old enemy who was thought to be defeated but has somehow returned stronger. Orochimaru could be a possibility. He was always obsessed with power and immortality. If Naruto is revived, Orochimaru might see it as an opportunity to study Naruto's new state of being (since he was revived) and use that knowledge for his own dark purposes.
There could be some very strange and out - of - the - ordinary fanfictions out there that might have such a plot. However, this kind of plot goes against the normal character relationships and storylines in the original Bleach series. Usually, fanfictions tend to focus on more traditional themes like battles, friendships, and power - ups rather than such extreme and uncharacteristic situations.
Well, in this fanfiction, perhaps it focuses on the journey of Harry getting escorted to Diagon Alley. It might include details like the route they take, the conversations that happen during the escort. For example, if it's a magical creature escorting him, there could be a lot of interesting exchanges about the creature's life and the magic of Diagon Alley. It could also explore how Harry feels during this escorted journey, whether he's excited, nervous or suspicious.
A monster that Percy has previously fought. For example, a Minotaur. It could have been given a second chance at life by a god and now owes a debt to Percy. It might seem strange at first, but its brute strength and knowledge of the Underworld could prove useful in protecting the gods.
Maybe Dobby could be an unexpected ally. He could use his magic to create distractions for the other contestants or help Harry find a hidden passage in the maze. Another possibility is that one of the Hogwarts ghosts, like Nearly Headless Nick, decides to assist Harry. He could float through walls and spy on the other champions' movements and relay the information to Harry.