One idea could be that Ultear and Gray are on a mission together in a mysterious land filled with magical creatures. Along the way, they discover a hidden lemon grove that has some special magical properties related to their powers.
For Gray, his cold exterior can be softened. The lemon - themed elements can be used to show his more sensitive side. For example, if he has to protect a lemon tree that is important to Ultear, it can reveal his caring nature. As for Ultear, her mysterious powers can be linked to the lemon elements. Maybe she can use lemon - scented magic or something similar to show her unique abilities.
One idea could be a story where Gray and Ultear team up to face a new, powerful dark magic user. They have to combine their ice and time - magic skills to defeat the enemy. Another plot could be a more character - driven one, like Ultear trying to help Gray overcome some past traumas related to his family and Deliora.
If they were in a modern - day city setting, their relationship might start as a comical one. Gray being all about his ice - making and Ultear with her time - magic could cause some hilarious misunderstandings. For example, Gray might accidentally freeze a coffee shop Ultear was about to enter, and she would be annoyed at first but then find it funny. Eventually, they would bond over protecting the city from magical threats that start to appear.
I'm not entirely sure as 'ultear lemon fanfic' could refer to a very specific piece of fan - created work. It might be a fanfic related to a character named Ultear, and perhaps the 'lemon' in the title could imply some sort of citrus - themed or fresh - themed aspect in the story. But without more context, it's hard to be more specific.
Another option could be Wattpad. There are many fanfiction writers on Wattpad who might have written stories about Natsu and Ultear. However, you may need to do a bit more searching as there is a large amount of content on the platform.
One good story could be 'A Magical Bond' where Natsu and Ultear go on an adventure together and their relationship develops in unexpected ways. It has great character interactions.
One possible plot could be that Goku, during his travels across different universes, somehow ends up in Ultear's world. At first, they are distrustful of each other. But as they face common enemies together, they gradually develop a mutual respect. Eventually, this could lead to a deep friendship that some might misinterpret as a romantic relationship, without any inappropriate 'lemon' aspects. They could team up to save Ultear's world from a powerful, dark force, with Goku teaching Ultear some of his unique fighting techniques along the way.
For Goku, his character can be developed by showing his adaptability to Ultear's world. He could learn about different types of magic and use his Saiyan ability to incorporate some aspects of it into his fighting style. For Ultear, she could grow in terms of her understanding of different power sources. Goku's simple yet strong sense of justice could inspire her to be more straightforward in her actions and less manipulative if she has such tendencies in her original character.
First, understand the characters well. Know Gray's personality traits, his likes and dislikes. Then, create a relatable reader - insert. Build a plot that is engaging, maybe start with a meet - cute or an interesting conflict. Use vivid descriptions to set the scene and bring out the emotions between Gray and the reader.