The relationship could start with fear. Maybe Purple Guy is initially afraid of the Marionette's power, and the Marionette is suspicious of Purple Guy's intentions. Then, through a series of events like being forced to work together to survive a threat in the FNAF world, they start to understand each other.
In a fanfic, their relationship might develop through shared memories. If there is some backstory that links them, like they both witnessed a certain event in the past. This could create a bond between them. Also, the Marionette could see some potential for good in Purple Guy, and start to guide him. Purple Guy, on the other hand, could learn to respect the Marionette's power and wisdom. They could develop a sort of mentor - mentee relationship that slowly turns into a more equal friendship over time.
Well, one way to develop their relationship is through a mutual enemy. For example, if there is a new and more powerful threat in the FNAF universe that endangers both of them. They have to rely on each other's strengths. The Marionette's ability to control the other animatronics and Purple Guy's knowledge of the place could be combined. As they fight side by side, they start to appreciate each other. Another way is through a twist of fate. Maybe Purple Guy accidentally saves the Marionette from destruction, and the Marionette decides to repay the debt by helping Purple Guy face his inner demons. This could lead to a complex and evolving relationship in the fanfic.
One common theme could be mystery. Since Purple Guy is often associated with dark secrets in the FNAF universe, and the Marionette has its own enigma. Another theme might be redemption. Maybe in the fanfic, Purple Guy tries to make up for his wrongdoings through his relationship with the Marionette. And also, horror is likely to be a theme as the original FNAF games are horror - based, and the presence of these two characters can create a spooky atmosphere.
The relationship might develop through shared experiences. If there's a food shortage in the area, they could work together to find solutions. This would bring them closer as they face challenges side by side. They would learn to rely on each other's skills, with the nice cream guy's creativity in flavors and burgerpants' knowledge of the local food scene.
Their relationship can be developed through shared adventures. For example, if they go on a treasure hunt together. As they search for the treasure, they face various obstacles like tricky puzzles and dangerous sea creatures. Spongebob's naivete and enthusiasm can contrast with Mermaid Man's more experienced and sometimes grumpy nature. This contrast can lead to humorous exchanges but also moments of mutual respect as they rely on each other's strengths to overcome the challenges. Eventually, they become closer friends.
The relationship could start with Moriarty being intrigued by Sherlock's intellect and gradually developing yandere - like possessiveness. For example, Moriarty could start leaving little clues for Sherlock that are both a sign of his affection and a way to draw Sherlock closer to him.
The relationship can be developed realistically through communication. Older Naruto can share his experiences of growing up, his struggles and how he overcame them with chibi Sasuke. This would make Sasuke respect Naruto more and start to open up about his own feelings and goals.
The relationship can be developed through shared challenges. For example, if there's a sudden flood of chocolate in the Candy Kingdom that's endangering the lives of the gummy citizens. Prince Gumball and Princess Bubblegum have to work together to build dams and barriers. During this process, they rely on each other's strengths. Gumball might be good at coming up with quick - fix solutions, while Bubblegum is great at long - term planning. This mutual reliance can deepen their relationship.
The relationship could be developed through a shared hobby. For example, if they both love music, they could bond over going to concerts or learning to play an instrument together.
The relationship can be developed through shared experiences. For example, if they face a difficult battle together, they will start to rely on each other more. This can break down the initial barriers between them. Another way is through communication. If they start to talk about their feelings, fears, and goals, they will understand each other better.
One creative way is to give them a shared past that they gradually discover. Maybe they were both involved in an experiment as children that gave them their powers, and as they uncover this, their bond grows stronger. They could also have a lot of banter and inside jokes that are unique to their relationship, which shows how well they know each other.
Their relationship can be developed through shared adventures. For example, going on quests where they rely on each other's skills. Rex might need Mythra's combat abilities and Mythra could need Rex's determination and kindness.