Aatrox's immortality could play an interesting role. He might be jaded by his long existence and see Irelia's mortal but determined nature as something both fascinating and frustrating. Irelia's ability to dance between her blades could be a form of combat art in the fanfic. When she battles Aatrox, her blade - dancing could be a display of her unique fighting style that Aatrox has never encountered before, which makes him respect her skills more.
The story could have Aatrox's ability to drain life force be a key plot point. Maybe he is weakened in the fanfic and needs to absorb life energy to regain his strength. Irelia's ability to control her blades could be used in a more creative way, like using them to form a shield against Aatrox's dark magic or to create a bridge across a dangerous chasm when they are on a quest together.
Perhaps a fanfic where Aatrox, in his more sentient moments, is intrigued by Irelia's unwavering will and spirit. He decides to test her, not as an enemy but as a way to understand the concept of hope that she represents, leading to a series of duels and philosophical exchanges between them.
For Fiora, you can focus on her noble upbringing and her sense of honor. Show how these traits influence her actions when she meets Aatrox. For example, she might be disgusted by Aatrox's use of dark magic but also respect his power.
For Aatrox, you could focus on his past as a Darkin. His internal struggle between his dark nature and any glimmers of his former self could be explored. Show how Fiora's presence either exacerbates or soothes this conflict. For Fiora, her pride as a duelist is key. You can show how she reacts when faced with Aatrox's power that might be greater than what she's used to. Does she become more determined or is she momentarily daunted?
Blake's shadow clones can be used for scouting or for confusing the enemies. If there are groups of hostile creatures, she can send out clones to different directions to split their attention. Yang's strength can be used for brute - force taming of the dinosaurs. She could wrestle with them and show dominance in a way that the normal Ark taming methods might not cover.
Well, Naruto's ability to sense chakra could be translated into a skill that allows him to detect hidden enemies or sense the intentions of other Servants in the Fate Grand Order. Also, his Nine - Tails chakra mode could be a special form that he can transform into, giving him increased stats and access to more powerful attacks like the Tailed Beast Bomb, which could be a super - powerful NP.
A Genin could have an ability where they can create lemon - scented illusions. The smell of lemons would be so strong that it would disorient opponents. For example, they could make the enemy think they are surrounded by a field of lemon trees, when in fact they are in the middle of a battle zone.
Mimikyu has the ability to create illusions. In the fanfic, it could use this ability to protect Pikachu. For example, when a powerful and dangerous Pokemon attacks them, Mimikyu could create an illusion of a much stronger Pokemon to scare it away. Pikachu's electric abilities could be used to power up Mimikyu's illusions, making them more realistic. They could also use their combined skills to solve puzzles. Say there's a maze that is protected by electric barriers. Pikachu could discharge electricity to temporarily disable the barriers while Mimikyu creates an illusion of the correct path for them to follow.
Naruto's speed could be translated into the speed of the Lamborghini. For example, the car could be described as moving as fast as Naruto when he uses his Shadow Clone Jutsu to move quickly. His ability to endure tough situations could be related to the car's durability. Maybe the Lamborghini can withstand extreme conditions like Naruto can in battle.
Reptile's ability to blend into his surroundings could be used for stealth missions in the story. For example, he could spy on an enemy and pass the information to Mileena. Mileena, with her sai skills and enhanced speed, could then lead an attack based on that intel.
One common theme is power. Aatrox is a very powerful character, so many fanfics explore his power, how he got it, and how he uses it.