Batman x Arc Reactor

[Meanwhile]

Bruce Wayne stood in the Batcave, the soft glow of the monitors casting shadows on his face. He scrutinized the data displayed on the screen before him. The analysis of the Lazarus Pit water from Nanda Parbat was almost complete, revealing promising yet inconclusive results. He needed the purest form of Lazarus' water to crack the secret behind its mysterious rejuvenating properties. The faint traces of foreign chemicals found in the water hinted at something more, something that could potentially complete his quest for an immortality serum. Ra's al Ghul's last words echoed in his mind, guiding him towards Infinity Island.

"Bruce, are you sure about this?" Selina asked with a concerned voice. She leaned against the desk, her green eyes watching him intently.

Bruce turned to face her, his expression resolute. "I have to be. If there's even a slight chance to fully understand the Lazarus Pit, I can't overlook it. Infinity Island has the information we're looking for. Besides, I think it's about time to check on The League of Shadows. Lady Shiva and Cassandra Cain... We can't let them be unchecked anymore. This is a good opportunity to either recruit or eliminate them once and for all."

Selina sighed softly and pushed herself away from the desk. She walked up to Bruce and wrapped her arms around his waist. "Alright. But promise me you'll be careful. Infinity Island isn't the place to play around. And the League of Shadows... They won't go down easily. If you are right about how the pit grants weird power, we must be prepared to face something unexpected."

Bruce nodded, his mind already working on contingency plans. "Don't worry, Selina. I know what I'm doing. And this time, you're coming with me."

"Hmmm... Sounds like fun," Selina purred, giving him a mischievous smile.

"With Harley and Kara, yep! It's gonna be fun."

"Wait! Harley?! You sure about her? She may be a lot better now but bringing her to Infinity Island..." Selina frowned, unsure if it was a good idea to bring Harley along.

"Well, she had to start somewhere, right? Besides, can you believe it, Harley completed Diana's training regiment without trying to run away!" Bruce chuckled, finding the fact rather amusing. "I gotta say, Harley is tougher than she looks."

Selina was shocked to hear the news. "Seriously? Wow! Diana's training regimen is no joke, especially the last day. But Harley survived? Impressive. Alright, I guess she deserves to come along. Just hope she won't mess things up. You know she's like a curious kid with stupid ideas. Last time she stole Diana's armor and lingerie, and you had to work overtime to prevent her from being blasted into space when she sneaked into your ship."

"Arg! Don't remind me, please..." Bruce grimaced at the memory. "That was a nightmare."

[Flashback]

Two weeks later after the construction of the space station began...

Bruce was preparing to oversee the construction of a new space station when Harley's eyes fell on the big black spaceship at the base. She grinned widely, having never seen such a large spacecraft before.

"Hey, Bats!" Harley called out, skipping into the base. "Whatcha up to? More Bat-gadgets to play with?"

Bruce glanced at her, his expression a mix of amusement and caution. "Harley, this is serious. I'm heading to space to oversee the construction of the new station. It's not a place for... shenanigans."

"Shenanigans?" Harley feigned innocence, her eyes wide. "Me? Never!"

Bruce shook his head and turned back to the monitors, unaware of the plan forming in Harley's mind. As he finalized the details and prepared to leave, Harley slipped away, her thoughts racing with excitement. She always wanted to go to space and look at the moon up close. But that was only a dream a moment ago. Right now, Harley won't allow anything to stand in her way of achieving her goal.

As Bruce boarded his sleek, black spacecraft, Harley was already inside, hiding in a storage compartment, wearing her nanosuit. She had managed to bypass the high-tech security systems thanks to the combination she had seen three times before when Bruce was working on the system. The compartment was cramped, but Harley's excitement kept her discomfort at bay.

'Alrighty, Harl. Now, time to wait, patiently,' She waited patiently, biding her time until the right moment.

'Sigh! This girl! What should I do with you, Harley?' His heightened senses caught Harley's presence. 'Well, might as well give you a space tour. So, I'll just play along with you.'

The spaceship started up, making a loud noise as it took off from the base. Harley smiled in the dark, feeling excited inside. She pictured how surprised Bruce would be when he found out she was there. 'Oh Batsy, you better enjoy this surprise!'

Space was so much bigger than Harley ever imagined it to be. The endless darkness of space surrounded her, making her feel small and insignificant. It was both exciting and terrifying. She peeked out of the compartment, taking in the spectacular view around her. Her heart pounded loudly in her chest as she stared in awe at the beautiful sight before her.

"WOW! This is amazing! So cool!" Harley squealed quietly, her eyes shining brightly.

Suddenly, the ship stopped moving forward and began ascending upwards towards the station. Harley watched as the massive structure grew closer, its enormous size dwarfing everything else around it.

Harley decided it was time to reveal herself. She crawled out of the compartment and made her way to the cockpit, her steps light and silent.

'Here she comes. Time to act, Bruce,' He smirked.

"Surprise, Bats!" Harley yelled, jumping into the cockpit.

Bruce nearly jumped out of his seat, his eyes wide with shock. "Harley?! What the—How did you—"

"Miss me?" Harley interrupted, a cheeky grin on her face. "I thought you could use some company."

Bruce's expression shifted from shock to irritation. "Harley, this is dangerous! You can't just—"

"Oh, relax, Bats," Harley waved her hand dismissively. "I can handle a little space adventure. Besides, you need someone to keep you entertained."

Bruce sighed, rubbing his temples. "Fine. But you follow my orders. No funny business."

Harley saluted mockingly. "Aye aye, captain!"

As the spacecraft approached the construction site, Bruce briefed Harley on the mission. He explained the importance of the space station and the careful planning involved in its construction. Harley listened intently, trying to absorb as much information as possible. She was trying hard to hide her excitement. She was really happy to be part of such a big project, even if it meant behaving... somewhat.

For a while, everything went well. Harley assisted Bruce with small jobs, and her excitement was a strange but helpful push. But then, her curiosity took over. While Bruce was maintaining the AI systems, Harley wandered away to explore the spaceship. She ended up in the cargo area, her eyes brightening at the sight of different tools and supplies. A plan started to take shape in her head, one that seemed like it would be fun and thrilling. She searched through the cargo, her smile growing bigger with each thing she found.

Then she spotted it: a small cargo ship designed for transporting materials to and from the space station. Harley's heart raced with excitement. She climbed into the cockpit, familiarizing herself with the controls, thanks to the suit's help. "Hehehe... Time to check out this baby," With a mischievous giggle, she started the engines.

The cargo ship hummed to life, and Harley navigated it out of the main spacecraft. She zoomed towards the moon, her laughter echoing in the small cabin. "Tehehehehee!!!"

Bruce saw through the glass wall as the cargo ship flew out. His left eye twitched slightly. "Harley... Hello... Harley. What are you doing?" He connected to the comms, hoping Harley would respond.

Harley giggled, waving at Bruce through the window. "Hiya, Bats! Don't worry, I'll be back soon. Just wanna check out the moon real quick."

Bruce pinched the bridge of his nose, a sigh escaping his lips. 'Fuck!'