Probably Gloria, the hippo. She's kind - hearted and might stay by Melman's side, bringing him water and making sure he's comfortable. She could also use her size to protect him while he's weak. And there's always Marty, the zebra. He's energetic and could run around to get help from the zookeepers or find any other resources needed to make Melman better.
The zookeepers are the most obvious ones who might help Melman get better. They have the knowledge and resources. They could give him proper medical treatment, adjust his diet, and create a more comfortable living environment for his recovery. Also, in the fanfiction, there could be a magical little bird that brings special herbs to cure Melman's illness. It adds an element of fantasy to the story and gives an unexpected helper.
Pikachu could be a big help. Since Pikachu is Ash's closest Pokémon partner, it would stay by his side constantly. It could use its electric powers in a gentle way to warm Ash up if he has a fever, like a little electric blanket. And just having Pikachu there would surely lift Ash's spirits.
Professor Oak could also come to visit Ash. He might bring some rare Pokémon medicines from his lab. And of course, Ash's mom would be there. She would cook all of Ash's favorite foods and make sure he takes his medicine on time and gets enough rest.
In the fanfiction, one possible cause could be that he ate some bad leaves. Maybe the leaves were contaminated with some kind of toxin from a nearby factory. Another cause could be that he caught a strange virus from an animal that recently visited the zoo.
Seth could be the one to help her. As her brother, he would be very concerned and might use his own knowledge of Fablehaven and its secrets to try and find a cure. He could also enlist the help of some of the friendly magical creatures they've befriended, like the fairies or the satyrs.
Anna would surely be the first to help Elsa. Anna has always been there for her sister, and when Elsa gets sick, she would do everything she could, like bringing her warm soups and staying by her side to keep her company.
His family members would likely help him. For example, his parents, Hank and Barb, have a lot of experience with superpowers and could try to figure out what's wrong.
Her best friend Veronica would probably be one of the first to help. Veronica is wealthy and could use her resources to get the best doctors for Betty.
In this 'jace gets sick fanfiction', Jace is the one who gets sick, of course. But there might also be his family members. For example, his mother could be a very important character, hovering over him, making sure he takes his medicine and gets enough rest. And perhaps there is a wise old doctor in the story, who tries different remedies to cure Jace.
In this fanfiction, not only her immediate family and friends but also neighbors or classmates could be involved. Neighbors might offer help like bringing over some home - made remedies. Classmates could be concerned and send her get - well - soon cards or come to visit her after school. And if there are any pets in Ginny's life, they could also play a role, like staying close to her and providing some comfort.
His teammates, Sasuke and Sakura, would surely be involved. Sasuke, although he may not show it as much, still cares about Naruto. He would keep an eye on Naruto's condition, and if there was any sign of danger, he would be ready to protect him. Sakura would be more hands - on with the medical care, checking his temperature, giving him medicine, and making sure he rests properly.