So I was rewatching the gmg arc, and something I really appreciated about the artstyle was how they made the celestial spirits glow compared to humans at nighttime, and it got me thinking of how Lucy's magic makes her fit right in with them but also look normal with the rest of her team, and it kind of spiraled from there so accept my brain rot pls.
As I was saying above, Lucy's skin & hair faintly glows in the starlight/moonlight. It's not that noticeable when she's standing next to other humans, but when she's with her spirits at night, she looks like she belongs with them.
Lucy is covered in light freckles, and occasionally they will move across her skin like shooting stars, or random lines will faintly connect like a constellation. It occurs more when she's around her immediate family or spirits. Team Natsu has a game where as soon as they see it they treat it like a shooting star, and everyone makes a wish. Lucy didn't notice it until they started doing it, and was freaked out about the freckles for a little bit.
Lucy practices what we would consider practical witchcraft, she has an altar set up in her apartment that she changes every time a new zodiac season starts. Even though she knows her spirits and has close bonds with them, she does this to feel close to other celestial spirits when they meet. She is also superstitious, and on nights when the team is safely asleep in her apartment she will put lines of salt across entry points in her apartment to ward off evil.
Natsu is always warm. Always. I know this is something that is exhausted but that boy wears crop tops and shorts constantly, and also loves walking around barefoot. He only wears the duster every once in a while, and team Natsu considers it bad luck when he does, because Fairy Tail always gets into conflicts when he does.
Natsu can use his hands like a heat gun, which is useful for when Lucy has to repaint her apartment when things get covered in scorch marks. Natsu finds it boring but Lucy threatens to not make him dinner if he doesn't.
Like Gajeel and Cobra, when Natsu starts to get really angry his skin starts to harden, and it looks like scales are emerging from under his skin. Watching them fully break through the skin when he uses dragon force scares the shit out of his enemies.
When him and Lucy eventually settle down and have kids, he has Gray, Wendy and Ezra help him gather scales from his dragon force to make a scarf for their children. Lucy and Erza get into knitting, and eventually drag Wendy and Gray into it too, and the entire team helps make the next generations scarves.
With his dragon senses, Natsu is fully tuned into his teams scent. He knows the scent of their favorite food, their blood, their hygine products. While he does know the rest of the guildmates general smell Natsu has fully committed his closet families smell into his brain.
Erza has to set a time every month where she sits down and repairs her armor and sharpens her swords. Before the team fully started leaning on each other the entire process would take her like 5 days, but with Lucy sitting down and asking Erza to teach her how, eventually the rest of the team started helping her. Lucy hosts it at her apartment, and they make a weekend out of it. Eating greasy food, talking shit on their enemies and discussing the latest guild goss, they manage to knock out Erza's monthly chore in two days.
Erza has to keep a mental inventory stock at all times. With how much swords that break during battle she has a revolving number in her head at all times, it's exhausting at times when she can't stop thinking of it before she goes to bed.
Team Natsu has managed to learn to glance at Erza when she's reequipping and from a single second can guess which armor she's getting into, and they're able to adjust their battle strategy/team work without speaking.
Gray will have steam coming off of him constantly when it's warm outside, and on those days no one blames him for his stripping habit.
At this point the entire team is used to seeing him naked and they don't mention it if they are at one of their apartments, but they all have an extra pair of clothes for him in their travel packs when they are out in public.
Lucy will gravitate towards him when it's hot outside, the mist feels nice, and as they got closer it's common for Gray to have a hand on her ankle/ shoulder to help cool her down. Wendy and the exceeds pick this habit up as well.
On the colder days Grays skin actually hardens, think of how Twilight described the vampires skin, and it will also sparkle lightly.
In his off time Gray participates in ice carving competitions, but he will have to travel to go to them. He is banned from participating in any of Magnolias since he always wins and it has started more than one fist fight.
Wendy is very sensitive to the weather, and can usually tell when a huge storm is coming before it hits Magnolia. She has helped save lives by warning the town of incoming deadly weather events, and helping them prepare for it.
Wendy moves silently, her footsteps are as light as air. While Team Natsu is used to it, she constantly scares other people in the guild and she feels bad about it, while the rest of the team finds it hilarious.
While her nose is not at the level that Natsu's is, she has gotten over her pride and has asked him to train her, and she is slowly picking up her team mates smell.
Natsu and Wendy curl up together on long train rides, usually both resting their heads on Lucy's lap. Wendy can't explain it but that woman makes the worst of the aches go away.
As Wendy starts getting more powerful she gains the ability to generate thunder storms and tornado, she also doesn't need Carla to fly. She doesn't use the ability though unless she's in dragon force, she doesn't care if she can fly on her own. Her and Carla are a team dammit.