This is a work of fiction and all characters should be assumed to be 25+ years old.
Tideblade

Vaporus

Tideblade stepped forward, unleashing a torrent of waves, slamming back the encroaching squadron of Fire Soldiers, extinguishing their flames and drenching the area, turning the battlefield into a swatch of warm mud. To her left, her partner Vaporus manipulated the evaporating water into choking clouds, farther driving back the Fire Soldiers.
“No one will ever stop the water warriors!” Vaporus shouted as the Fire Soldiers retreated, utterly routed. The pair continued to push forward into the deserted Fire Soldier outpost.
“Might be some intel in there,” Tideblade said as they approached the large tent in the center of the outpost. “Maybe we can find out why these flaming scrubs keep trying to invade.”
“No idea,” Vaporus said, following her inside. The tent was divided into two sections with a large flap hanging over the back half. A hastily assembled desk flanked one wall and a large mirror was propped against the other.
“Check out how hot we still look,” Tideblade said, striking a pose in front of the large mirror, her cropped blond hair framing her face. The uniform she and the other water warrior wore into battle were largely a joke, an afront to her enemies. She and Vaporus had graduated the academy the year prior, and her outfit with the smooth cloth clinging to her like a second layer of skin, the plunging neckline moving through her cleavage to her navel, accentuating her firm breasts, and the miniskirt barely covering her panties, along with the fuck-me heels sent a message all on its own.
“Seriously,” Vaporus said, joining her and briefly letting her brunette locks tumble past her shoulders before pulling it back again into a ponytail. “We’re just so much better than them that we can show this much skin, knowing we’re never in any real danger. Flaunting targets.”
“And the goods,” Tideblade said, lifting her firm breasts and pushing them together.
“I get that,” Vaporus said, turning around and lifting her skirt, revealing her shapely backside. “I’ve always thought my butt looked better.”
“Relax,” Tideblade said, putting one hand on Vaporus’s shoulder. “You’re gorgeous. We’ve been friends for decades, so you know I’m being honest with you.”
“You also straight up told me you never go down on ugly people,” Vaporus answered with a sly smile.
“That was a fun night,” Tideblade said, turning back to the desk in the tent. “But we should seriously get some intel, then fall back.”
“Yeah, these assignments fucking suck,” Vaporus said, sorting through some of the paperwork. “I mean, we have a type advantage against the fire nomads. You’d think they’d figure out they can never beat us by now. The two of us took out that entire squad and didn’t break a sweat.”
“Wait a second,” Tideblade said, suddenly alert. She looked toward the flap at the back of the tent. “Did you hear that?”
“Hello?” Vaporus said, taking a few steps forward, then pushing back the flap. “Tideblade, we got a problem back here.”
“Holy fuck,” Tideblade said, joining her partner.
In the back of the tent, in the combatant zone in disputed territory, in a crude iron cage, sat, nearly dehydrated, another water warrior, only recognizable by her costume.
“Help me,” she whispered.
“I’m Tideblade,” Tideblade said, crouching and passing a flask through the bars. “And she’s Vaporus.”
“Geo,” the caged woman said, emptying the flask. “Thank you, I can feel my strength returning.”
“What year are you?” Vaporus asked, examining the cage and finding a lock with a keyhole. Water manipulation on such a small scale required a certain degree of concentration, but she managed to turn the tumblers, causing the gate to swing open. “I don’t remember you from the academy.”
Geo clambered out of the cage. “That’s because I didn’t go,” she said, pulling herself to her feet. Thin torrents of mud formed under her as the floor of the tent liquifacted.
Tideblade’s eyes widened. “Vaporus, get out,” she shouted, already launching herself toward the exit of the tent. However, her impractical footwear sunk into the quickly forming mud and she found herself knee deep in the mess. Her arms pinwheeled and she fell forward, bracing herself with her hands. The mud flowed over them, then hardened, leaving her face down and ass up, her miniskirt flopped over her back and revealing her panties.
The tent combusted and incinerated in a burst of flame, leaving both water warriors in the broad daylight again. Tideblade looked around. Nearby, Vaporus was caught in a similar predicament, spread-eagled on her back, trapped in the mud.
They were surrounded by Fire Soldiers. One, a commander, approached, his hair slicked back. Geo stood next to him. Tideblade glared at her with gritted teeth, struggling against the constricting dirt, trying to summon some moisture, but what little water she could command was quickly wicked away by the thirsty soil.
“You can try struggling,” Geo said, taking a step forward. The mud congealed against it. “But you little bitches from the water tribe should know earth has a type advantage.”
Tideblade and Vaporus briefly made eye contact and they both realized what had happened. “We thought the earth and fire tribes were at war.”
The commander stepped forward and made a gesture Tideblade didn’t understand. “I am Sparky, and I speak for my men here. We tried a little thing called ‘diplomacy’ with our allies, as it turned out we had a mutual enemy.”
“Sparky?” Tideblade said, holding her head up and trying not to laugh. “Your name is Sparky?”
“You think you’re all that,” Geo said, grabbing Tideblade by the hair and yanking her head up. “But you stepped right into my little trap.”
“Release me,” Tideblade said. “As a combatant captive I have specific rights-”
Geo slapped her across the face. Tideblade recoiled. “Yet no one’s around to enforce them,” Geo said. “Right now, Sparky and all his friends have specific rights to, shall I say, trespassers?”
“What are you going to do to us?”
“We’re going to become really good friends,” Geo said as she reached behind her and undid the skirt on her stolen water warrior costume, letting it fall away, revealing she didn’t have any panties on beneath. “And judging from what I overheard earlier, you really like going down on your friends.”
“Let’s get a few things straight,” Sparky said, unzipping his pants. “If you’re going to dress like a fucktoy, you’re going to get treated like one.”