One Piece: Ace x Marco Possessive Fanfiction - How Would Their Relationship Affect the Crew?

One of the key themes could be loyalty. In a possessive relationship in this fanfiction, Ace and Marco might show extreme loyalty to each other. They could be possessive because they don't want to lose what they have in each other. Another theme might be sacrifice. Given their personalities in One Piece, they might be willing to sacrifice a lot for the other in this possessive dynamic.

One possible scenario in this fanfiction could be that Ace and Marco are facing a powerful and unknown enemy in a spooky, haunted island. The island is filled with strange noises and dark shadows. Ace's fire powers seem to be ineffective against this new threat as it keeps disappearing and reappearing. Marco, with his phoenix abilities, tries to scout from the air but gets caught in some sort of dark mist. They have to rely on each other and their friendship to overcome their fear and find a way to defeat this mysterious foe.

Growth is a prevalent theme. As they go through various battles and experiences in the fanfictions, they grow both as individuals and in their relationship. Their understanding of each other and their own abilities develops. Additionally, the theme of brotherhood is strong. They are like brothers in the crew, and this brotherly love is often a central focus in these fanfictions.

A popular fanfic is 'Under the Same Sky: Marco x Ace'. It delves deep into their characters, exploring their individual strengths and how those qualities blend when they are together. It also has some great action scenes and emotional moments that are true to the spirit of One Piece.

One way is through shared secrets. For example, Ace could tell Marco a secret he's been holding about his past that he hasn't told anyone else. This would deepen their connection during their cuddle time as it shows a new level of trust.

It could be that they are trapped in a dark dimension. Here, the laws of the normal world don't apply. Ace tries to create fire, but it turns into ice instead. Marco's wings start to freeze when he tries to fly. They are surrounded by strange creatures that seem to be made of pure darkness. They have to work together to find a portal that will take them back to their world. Ace uses his intuition and Marco uses his knowledge of the One Piece world to search for clues on how to escape.

There's a fanfiction called 'Under the Same Sky'. It takes place during a time when the Whitebeard Pirates are facing a powerful enemy. The story shows how Marco and Ace rely on each other, their trust and loyalty shining through. It's full of action scenes as well as some tender moments between them.

If Luffy goes back far enough to change the events at Water 7, perhaps Usopp would not leave the crew. This would prevent the internal conflict that the crew faced at that time. The crew would be more united from the start, and they might be able to face Enies Lobby even more effectively. Their bond would be stronger, and it could lead to different power - up scenarios for the crew members as they would be more focused on growth together.

The appeal of 'One Piece Marco x Ace fanfic' lies in the strong bond between the two characters. Their friendship in the original series is quite interesting, and fanfics can expand on it further.

One common element could be the exploration of the relationship between Ace and Marco in a more intense or troubled context, which the 'nightmare' aspect might bring. Maybe it shows them facing some sort of shared trauma or difficult situation that is related to their past or future in the One Piece world.