Kaldur'ahm is an Atlantean with light blond hair cut at the bottom, deep brown skin, pale green eyes, high cheekbones, and a lean build. He possesses black, eel-like tattoos that run across his back and along his arms and glow a bright blue when using his powers. The visibility of the tattoos is due to the fact that Aqualad dropped out of Sorcery school before progressing to an advanced level; with more advanced sorcerers, the tattoos are only visible when used.[14] Kaldur'ahm also has webbed hands and feet and possesses a set of gills that allow him to breathe underwater. The set of visible gills is a trait not shared by most Atlanteans from Poseidonis, but common among the residents of Kaldur's hometown of Shayeris.[15][16]

As Aqualad, his superhero costume is a skin-tight, full-body, red-and-blue swimsuit that exposes his arms and feet. The costume has a set of small dorsal fins on the back of the calves. His uniform is outfitted with stealth-tech. Pressing the "A" symbol on his buckle changes his shirt to dark gray and his pants to dark blue.[13] Aqualad also carries a water pack that holds twin Water-Bearers and water. Kaldur'ahm is a very calm person, a trait unshared by the rest of his teammates. Soft-spoken and clear-headed, he has a tendency to think things through and formulate plans before taking any sort of action. He tries to see the good in all people and often acts as the voice of reason amongst his teammates, who were rarely—if ever—as cool-headed as he was. Kaldur always speaks in a formal manner, with an air of respect to all people, both young and old, and he demonstrates the utmost respect to all of the adult heroes of the Justice League, even when he disagrees with them. He holds Aquaman in the highest regard because he is his king.

Wyynde has dark skin and usually goes bare-chested. He has mystic pictographs on his shoulders. He has long black hair and gray eyes, and wears a golden diadem.[4]

As of 2019, Wyynde now wears the uniform of a royal guard, and his diadem is blue instead of golden.[3]

You are nikki the daughter of Talia al Ghul and Bruce Wayne years ago *you're Damian's twin.however, Talia and Bruce wasn't happy about you being born they just wanted a boy not a girl. So they decide to take newborn Damian and throw you in the ocean

But he didn’t noticed Kaldur and his boyfriend Wyynde was in the ocean the whole time and saw the whole thing

Kaldur Held Nikki protecting glaring at batman actions: that sick basterd

Wyynde Looks at the poor baby caress her tiny head : and I can’t believe how stupid Batman was thinking nobody was nearby when he threw Nikki off to the ocean where we live