Based off a roleplay/conversation with @pizzadogrules :)

-

Tony looked up as the doorbell rang, mid-experiment.

"JARVIS, WHO IS IT?!" he hollered, and Bruce covered his ears.

"I am unsure, Mr Stark," JARVIS answered, "she isn't in my database."

"Everyone should be in my database," Tony frowned, "didn't I tell you to tap into SHIELD's database for that reason?"

"Wait a moment," JARVIS paused, "I think I have something. Does the name Kate Bishop ring any bells?"

"KATE!" Clint's shout echoed through the rafters, and Tony sighed.

"It seems that this Kate is a friend of Clint's. Let her in."

JARVIS complied, and Bruce took off his science goggles.

"Shall we go to the living room to say hello?" he suggested.

"You can," Tony shrugged, "I'll come later."

Bruce raised an eyebrow.

"JARVIS, do me a favour and remind Tony to come in a couple of minutes, otherwise he'll forget. And use that really annoying ringtone."

Tony rolled his eyes.

"Fiiiine, I'll come now."

Bruce smirked, and Tony put down his science equipment.

Whoever this Kate is, she'll be paying for taking my science bro time.

-

"So, how long have you and Clint known each other?" Bruce enquired politely as Kate collapsed onto the couch.

"Oh, for aaaaaages," Kate replied, rubbing Lucky's head.

"Is that a dog?" Tony scowled, "who said you could bring a dog into my Tower?"

"It's Lucky!" Clint protested, "he can go wherever he wants to, he's like my sidekick!"

"You're his sidekick, if anything," Kate teased.

"Are you related?" Wanda enquired politely, although she undoubtedly knew the answer already.

"No, luckily for me," Clint joked.

"Are you going to be related?" Pietro asked, sensing an opportunity. 

"No," Kate answered quickly, "he's just... we're..."

Tony smirked.

"Awww cute! When's the wedding?"

"There's not going to be a wedding," Kate snapped, "he's my mentor, okay? Eww, you guys are gross."

"Truer words have never been said," Loki muttered from where he was making coffee in the small kitchen area of the living room, and everyone looked at him in surprise. 

"Did you forget I was here again?" Loki rolled his eyes, "By the Norns, I know I try not to be noticed but you don't have to pretend to be surprised every time I say something."

"Back to Kate..." Bruce muttered, subtly veering the topic away from Loki, "so... what can you tell us about Clint that we don't already know?"

"That he has no self control when it comes to pizza?" Tony suggested, stuffing a slice of said fast food into his mouth.

Kate laughed.

"Lucky's more of a problem than Clint when it comes to pizza. No, it's coffee where he really has no restraint."

Lucky barked in agreement, and Clint pulled a mock-offended face.

"It's kind of hard to sleep when your apprentice spends her days chasing after villains and almost killing herself (I'm looking at you, Kate) while the Avengers manage to screw things up the moment you try to retire. I need coffee to survive."

Bucky chose that moment to saunter into the living room.

"Did someone say coffee?"

"Bucky no!" Steve dashed into the room after his friend, "if you drink any more coffee you'll die from caffeine overdose!"

Kate raised an eyebrow.

"How many cups has he already had?"

"At least seven!" Steve exclaimed, a desperate look on his face.

Clint and Tony snorted simultaneously, while Loki let out an amused chuckle. Kate skipped all subtlety and burst out laughing.

"What's so funny about that?" Steve frowned, "he's going to kill himself!"

"Who's going to kill themselves?" Natasha enquired, walking into the living room and straight towards the small kitchen that made up a part of it, pausing when she saw Loki there and then moving to the couches instead.

"Rogers fears that Barnes is going to kill himself with an overdose of caffeine," Loki answered, because everyone else was too busy either laughing at Steve, trying to contain their laughter at Steve, or, in the case of one american-themed super-soldier, scowling angrily.

"How much has he had?" Nat enquired.

"Seven," Tony answered in between laughs. 

"Seven pots?" Natasha pursed her lips, "I suppose that's bordering on dangerous, but he is a super-soldier, isn't he?"

"No," Pietro answered, shaking his head, "seven cups."

"Only seven?" Natasha raised an eyebrow, "he'll be fine, Steve."

"Are you sure?" Steve asked, but Loki had already carelessly pushed a mug of steaming coffee into Bucky's hands. (It still regularly baffled everyone how Loki managed to do debatably "nice" things with an air that made them seem rebellious and Loki-like).

"Have you seen how much coffee Clint drinks?" Kate enquired, "he's got to be on like... twenty pots a day?"

"Don't overreact Kate," Clint muttered.

"Well I suppose you can't compare Clint to a guy with a metal arm," Kate smirked.

"Because of the super-soldier thing or because Bucky's older?" Bruce guessed.

Kate glanced at Bucky.

"He can't be that much older than old Clint."

Natasha and Steve sniggered, and Pietro smirked.

"You're right, he's not thaaaaat much older, no?"

"Give or take fifty years," Loki muttered, taking a sip out of his own mug of coffee and crashing onto an empty couch.

"BROTHER!" Thor announced, storming into the room, "HERE YOU ARE! I WAS SEARCHI—"

Thor stopped to study Kate.

"And who might this young lady be?"

"She's Kate and she's my apprentice, hands off," Clint growled.

"He was just being polite," Bruce pointed out, "you know how Asgardians are."

"All Asgardians except Loki," Clint added with a scowl.

"But Loki is Jotun, is he not?" Pietro frowned.

"I'm right here you know," Loki stated, not taking his eyes off his book (who knows where he got that from), "once again, I'm not invisible, and no amount of wishing on my part can get me out of this Tower, so you're kind of stuck with me."

Kate cleared her throat.

"Anyway, I'm Kate Bishop, AKA Hawkeye. I'm pretty much an Avenger."

"You were a young Avenger, but you quit," Clint corrected, "stop introducing yourself that way." 

"Yeah, well, I quit so you wouldn't end up killing yourself," Kate pointed out, "so I wouldn't complain if I were you."

Clint snorted.

"Hmpf, I've survived all sorts of things without you, I'd have been fine."

"Whoa whoa wait, is the Young Avengers an official thing now?" Tony frowned, "I thought Fury scrapped that?"

"Fury 'scrapped' the original Avengers Initiative," Bruce noted, making quotation marks with his fingers, "yet here we are."

"Young Avengers..." Pietro mused, "that sounds like something for Sam!"

"Sam?" Bucky seemed amused at the thought, "you don't think Wilson is a bit old for that?"

"I believe he meant Lady Sam Wandadóttir, Sergeant Barnes," Thor noted.

"Sam WHO?!" Kate raised an eyebrow.

"Samantha Maximoff*," Loki answered monotonously, "although in Thor's defence she IS Wanda's daughter, so by Asgardian naming her title would be Lady Wandadóttir."

*Frost Series

"Wanda has... a daughter? That's, ummmm, new."

Kate laughed.

 "What? Feeling a little old there, Clint?"

"I'm confused again," Tony raised his hand as if to ask a question, "Clint, you knew about Samantha, didn't you? And don't you have three kids? We saw them!"

"Cooper, Lila and Nathaniel Pietro 'Traitor' Barton," Natasha listed, her gaze jerking for a moment to Pietro, who had a satisfied smirk plastered onto his face.

"And I'm still not older than Bucky," Clint pointed out, effectively avoiding all of Tony's questions.

Loki scoffed once more.

"And Bucky's nowhere close to as old as me or Thor. You're all mortals, after all."

"I'm starting to get confused," Kate stated, "you have kids?"

"It's supposed to stay a secret," Clint hissed, "except somebody decided to blow up Johannesburg and needed a safehouse."

Bruce fidgeted guiltily with his glasses, and Wanda bit her lip. 

"Oh, I don't mean you Bruce, I can't blame you for the actions of the Hulk, and I don't mean Wanda either."

"So who are you blaming?"

"If I need to blame someone... Tony."

"Why would you blame me?" Tony demanded, "just because I made Ultron? Because Bruce helped!"

"No, I'd blame you because you're the most annoying person in the room, and because if I could get you arrested I'd have plenty of time to find your secret cash stash."

"It's not so secret, just really well-guarded," Loki knew, and Wanda raised an eyebrow.

"And how would you know that?"

Loki shrugged.

"I have my sources."

"Well... I'd have plenty of time to break in then," Clint went on.

"Umm..." Tony began, "you know I'm still here, right?"

"Just ignore them, Tony," Natasha advised, "especially Clint and Loki, you should know better than to listen to them anyway."

Loki shrugged in simple acceptance of the facts, while Clint frowned.

"Excuse me, I'm your best friend Nat! Why are you advising people to ignore me?"

"You need to be more gentle with him," Kate advised Natasha, "he's sensitive, like a kid."

Natasha raised an eyebrow.

"He's sensitive? Well then he clearly has a poor choice in friends."

"I second that," Tony spoke up, "Natasha is the most insensitive person you'll find."

"Hey!" Nat exclaimed, glaring at Tony.

Loki simply raised an eyebrow, choosing to stay in the background and keep the judging mental.

"Well, we all know Clint's never been the best for making smart decisions," Kate laughed.

Lucky whined softly, and Clint bit his lip.

"Stop arguing guys, you're upsetting Lucky. And Kate, keep the insulting to a minimum please."

"This is the minimum," Kate muttered, and Clint rolled his eyes.

"Whatever. And besides, I could have more friends if I wanted to, but I like you guys."

"I don't think you could even if you'd wanted to," Pietro scoffed, "you're too annoying for anyone but Nat and Kate to put up with you. And Lucky, of course. Also you're a walking arrow-firing coffee devourer, old man, what's to love about that?"

"That was nice of you," Clint retorted sarcastically.

"Hey bullet boy, you can't talk to a Hawkeye like that," Kate challenged.

"Who are you to say that?" Pietro enquired, "this is not your Tower."

"Yeah, well, it's not your Tower either, Stark's made that pretty clear," Kate countered.

"What was that supposed to mean, Katie?" Clint enquired.

"Wanda, she's being annoying," Pietro grumbled.

"I literally know what you're thinking and the answer is NO," Wanda replied, not looking up from her book.

"Okay, A) who are you and why can you read minds?" Kate inquired, pointing to Wanda, "and B)  STOP CALLING ME KATIE."

"I'll be sure to remember that... Katie," Pietro smirked.

Kate turned to Clint with a scowl.

"Now look what you've done."

"And to answer your earlier question," Pietro went on, "this is Wanda, my sister. And she can read minds because she's an Avenger." 

"What do you think would happen if we were to lock those two up in a room?" Tony whispered to Bruce.

"Who's locking who in a room?" Kate frowned.

"It'd better not be Kate and Sonic," Clint warned, "because she is not allowed to sort-of date another speedster. Tommy was a disaster."

"Yeah, because SOMEONE attacked us," Kate answered pointedly. 

"And who was it, in the middle of a fight, that was talking about how you should only be friends?"

"Oh shut up old man," Kate muttered.

"What if—" Tony began.

"NO." Bruce answered.

"Whoa, hold up," Pietro held up his hands, "ANOTHER speedster?"

"Yes, do tell us," Steve nodded, "who is this Tom?"

"Holland or Hiddleston?" Loki added under his breath.

"He's just a friend on the young Avengers," Kate answered quickly.

"He's got a really ugly green costume," Clint elaborated.

Tony smirked.

"Well maybe that's why none of US wear green."

Bruce and Loki glared at Tony, but he didn't notice, to the others' amusement.

"I'd be careful with your words there, Starky," Kate smirked.

"I'd be careful with your nicknames there, Katie," Tony countered.

"Look who's talking," Sam huffed.

"This is all your fault, Clint!" Kate pointed out, "if you hadn't said Katie, none of them would have known!"

"Yeah, sure, just blame it on the blonde. That's fair."

"What am I being blamed for?" Thor enquired with a frown, and everyone else groaned.

"Not you Thor." Tony pointed out with an eyeroll.

"Oh. :( ."

"Don't worry, I'd never blame anything on you, Thor," Kate smiled.

"What's that supposed to mean?!" Clint demanded.

"Ohhhhh someone's jealous," Pietro smirked.

"Oh just shut up Road Runner."

"Is nobody going to address the fact that Thor just used an emoticon in a verbal conversation!?!?" Bucky enquired.

Bruce glanced at his watch.

"It's starting to get late... I'm going back to the lab. It was nice meeting you Kate!"

"I'm coming too, although I must say this was fun," Tony admitted, "maybe we'll see you around again soon?"

"Maybe. Feel free to take Clint with you!"

"Stop trying to sell me off, Katie," Clint sighed in exasperation.

"Well, we all know Tony doesn't want you around his lab anyway Clint, so you're safe," Natasha laughed.

"Because Tony prefers to work alone with Bruce?" Kate guessed.

"Actually, no, there is a whole different story behind that," Pietro grinned.

"...which we are not telling now," Wanda finished for him, "in fact, I think we should leave too. Pietro?"

"Awwww..." Pietro deflated slightly, before perking up again, "see you later Katie."

 "Don't call me that," Kate ordered, "and Wanda, I'd like to ignore your brother, but feel free to stop by, call, or text any time. Stark will find that he has my contact info if he bothers looking."

"I take it you're leaving?" Loki enquired.

"Yeah, I have some other stuff to do," Kate admitted, "but I'll see you all around sometime, no doubt about it."

Kate stood up, and began to walk towards the door.

"Don't forget Lucky!" Clint shouted.

Kate whistled, and Lucky jumped off his spot on the couch (he had been sitting on Loki's legs) and ran up to her.

"See you later, losers!" Kate shouted over her shoulder in a sing-song voice, and then she was gone.

There was a momentary silence.

"Can we get a dog?" Loki asked.