One Piece Headcanoncs: A/b/o dynamics ft Omega Ace
I like to think that while Ace isn't necessarily ashamed of being an omega, he doesn't talk about it. So no one really knows.
Which would lead to Marco asking Ace when his rut is so they can have it recorded and help him keep track of it. Ace absentmindedly telling him he doesn't have a rut which immediately sets everyone off in a panic because that's not healthy what do you mean you don't have ruts?
But he cuts in and tells them when his heats are.
Marco just dropping his pencil and everyone just staring at Ace because what?
Pirate omegas aren't necessary rare but they aren't super common and they're usually easy to identify.
But the young, rookie captain? The kid who tried to kill Pops? That kid?
It's a little hard to accept right off the bat. Very unexpected.
Ace is 6'1" and packs a hell of a punch, even without his devil fruit powers. He's outgoing and pretty solidly built.
Nothing about him necessarily screams omega.
But they also think about long lashes and grey eyes that burn silver in the sunlight. How Ace doesn't look for praise or physical affection but he thrives under it each time he gets it. The dip in his waist that gives him just the slightest curves and even though he was strong, he had a lean build, and needle sharp canines.
Not that those things necessarily meant anything either.
They think about the swordsman from that rookie crew... what was it? Something with a Z. He was built like a brick shithouse from what they remember and he was an omega, at least according to Haruta's info.
Maybe Whitebeard would be slightly torn because omegas are viewed similar to how he thinks of women and shouldn't necessarily be on the battlefield.
Ace would never allow that though and he's been settled in for awhile without anyone even knowing.
Ace always wears a scent patch because he doesn't like being considered a distraction and he honestly doesn't like letting people know that much about him.
He starts slowly going without his patch sometimes though. Especially after everyone makes peace with the idea of it and encourages him to allow himself to embrace that side of hismelf.
He smells like fall islands and smoldering bonfires. Smoking cedar and pine, warm spices and citrus.
Not the traditional scent of omegas, which are usually something sweet, but it's rich. It hangs heavy in the air and on his skin.
He starts letting little chirps out when he sees someone is back from a mission or even as a greeting when he's distracted.
Small little purrs that they can barely hear when dinner is one of his favorites or someone mentions Luffy.
The louder purr that rumbles in his throat when he scents them or is close to his heat and especially affectionate.
He learns to use his scent to provide comfort for injured crewmates or to help them relax, and how anger or sadness twists his scent in a way that makes everyone on edge.
He starts swiping stuff from the crew like blankets, clothes, bedding, etc.
And it's good that he's a commander, especially with him seeming to fully embrace this side of him for the first time. He's able to scent the space as his and make a nest that they all refuse to admit is both adorable and impressive.
The commanders rooms are all made to handle ruts and provide maximum privacy, so Ace is able to have his heat in his without any problems.
While it's strange, having not only an omega commander but also one who becomes so comfortable in his dynamic, they love Ace dearly.
They're a little more on guard when he wonders off on his own, or when he's not wearing his patch and the people on the islands follow their noses to him with greedy eyes.
One time they lost him during a short trip to one of their protected islands, all of them on the verge of panicking and getting ready to start tearing the place apart before he showed up.
A clumsily made flower crown on his head, a small child on his hip, and a crowd of children huddling around him and clinging to his legs.
It's common knowledge that an omega scent is comforting, especially to children, but seeing it is entirely different.
With wind burned cheeks and flowers in his hair, a littl girl settled on his hip like she belonged there and happiness practically radiating off him, it was easy to understand how everyone gave in to their instincts just the slightest bit and let themselves imagine for just a second.
Of course he and Marco end up together, although Ace will always be all of theirs.
Ace fits with him so well, Marco wrapping around him with ease and their personalities balancing each other out. The pure warmth radiating off Ace in his heat is perfection for the Phoenix while it would have been too much for anyone else.
Marco being old enough and experienced enough to control himself and his instincts as Ace figures it all out but also clearly an Alpha with good instincts.
He brings Ace soft things to nest with, the freshest fruit he can find when they visit islands, and lets Ace ask him all the questions he has about dynamics.
Even when it's questions about things that make his teeth itch to bury themselves in the omega's neck or drag him to his room and make sure he's tucked away, safe.
Eventually Ace has a mate mark, scarred on his neck for the world to see along with Pops tattoo on his back. He now bares two marks that bind him and he loves it, especially when he never would have even considered the idea years ago.
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