This is a really, REALLY random one shot I wrote after I was sent a tumblr post about a possibility for Pietro to annoy people (you'll see).

I wouldn't have uploaded it if not pretty much every review asked about my OC from the one shot "Nightmares" (I didn't know people acually read these bottom notes o.O). That title is a public menace too. Hopefully I'll find a better one someday.

Info: The name "Eidolon" means something like ghost or apparition in old Greek. Thanks to Just A Little Birdy for that. Maybe, hopefully, I'll write an OS someday where Olli actually receives that name. This one shot (and the second one "Strange night") was written before I decided on that name. So don't be confused why it doesn't appear yet.

For some reason it sounded incredibly weird to me to write in third person about Olli. So I stuck with the second person form.

Public menace

"PIETROOOOO!"

The door slammed as something silver-blue flashed past you. You heard a giggle, then it was gone. Hesitating, you opened the door, just to almost get a cup in the face. You dodged it, barely, the cup coming to a rest centimeters over the floor. You picked it up.

"Ah, Olli," Wanda said. "Hi. Sorry for that."

"Hi," you replied and sat the cup down on the counter. "What did he do?"

Wanda shrugged. "Are you actually asking this?" You shook your head. Wanda tried to be nice, you knew that. She still wasn't happy about you dating her twin, but her animosities had subsided and you had become somewhat similar to acquaintances, if not friends.

You got yourself a coffee. "So he's still all over that. Seriously, Tony deserves salt in at least one of his coffees." You had said that absently, but then you realized that was not such a bad idea. After all he was responsible for all that mess. Just because he came over for a week. That guy was trouble on two legs. He should never have showed Pietro those cartoons.

For one whole week, Pietro's favorite occupation had been whispering "meep-meep" to somebody and getting the hell out of there, giggling like a five-year-old. And he didn't seem to plan on stopping. By now even the jokes had died. Like Rhodey put it: "If he says that once again and isn't fast enough, he won't say anything for a while."

"Morning," a sleepy Sam Wilson murmured when he came into the kitchen. He nodded at Wanda and walked right past you on his search for coffee. You stepped out of the way.

"So, you and Lucy, you're not going to kill each other anymore, right?", he yawned.

"I believe she prefers to be called Olli," Wanda said, shooting you a questioning glance. You grinned and laid a finger to your lips. Wanda and Vision were the only ones able to see you without needing to focus. That made you some kind of accomplices, you presumed. Since Vision was not really a type for pranks, Wanda it was. She was a reliable and nice person, you knew that. Just very protective of her brother. But now, after almost two months, things had calmed down a bit.

"Please tell me that public menace is not here right now," Sam murmured. "No offense, Wanda." She just shook her head with a smile. Sisterly love or not, Pietro was a troublemaker. Everybody knew. Outside was a little scuffle and a curse, followed by a giggle.

A second later, Pietro was standing in the room like nothing had happened. Only Rhodey and Vision and then the new team was complete or what? You stayed out of the way as he flitted about the kitchen, too fast to be seen as more than a silver-blue flash. You needed to wait until he stood still for a moment.

"Any idea where Olli is?", he asked after finishing his coffee with a lot of sugar (otherwise he probably couldn't keep up that speed). Sam shook his head. Wanda didn't say anything. Pietro went on without waiting. "Well, I gotta fetch her. She's a sleepyhead. ...meep, meep." With that, he was gone and left you behind very disappointed, but with a grin. He'd be back in seconds anyway.

Seconds turned to minutes while Sam was waking up and Wanda stirred her coffee, casting discreet glances at you.

"Morning," Steve said loudly when he came in, followed by Rhodey. "Did you see Olli? Selvig and the others want to run a few more tests on her ability." You finished your coffee and watched them, while Wanda played innocent.

"Pietro's off to fetch her," Sam said. "Guys, why the hell are we standing here anyway? Two people more and the kitchen's full. I sure don't need to cuddle with anyone before all got a shower."

Pietro appeared in the door. "She's not in her room."

"Who's where, Roadrunner?" There he was, the guy responsible for the whole mess. (Except the fact that Pietro was an annoyance even before.)

The one and only Tony Stark, who now was here to fetch his obviously already prepared coffee. You grabbed the salt, trying to be quiet. Wanda helped you by shifting a chair a bit too loudly. She smiled at them innocently while you went over to Tony's mug, or what you supposed was his. He had his back turned to you, blocking the view for everybody else. You poured the white crystals into the black liquid and got the hell away before he bumped into you.

"So, Steve tells me you've become quite the team. Care to come over to the Avengers Tower sometime? And that new talent... Lucyna Oliver, right? I'd love to meet her." The great Tony Stark wanted to meet you. That still felt like one hell of an honor. You, an Avenger. Whoa.

"We've already picked an Avengers name," Rhodey announced. "It's either Ghost or Chameleon."

You rolled your eyes. Seriously? That was the best they could come up with? Before you could even get the chance to be angry at them, Tony doubled over and had just enough time to spit his coffee in the sink. "What the hell?"

You couldn't help yourself. You whispered "Meep-meep" into his ear and made a dash for the door, giggling like a school girl. It might not be as effective as with Clint (he had visited a few weeks ago and seemed to have declared war on Pietro, which turned out to be a long-lasting thing), but it was hilarious enough. You jumped into Pietro's arms, only able to enjoy his confused face about your sudden appearance for a second, and whispered "Run!" into his ear. Fortunately, he complied immediately, or at least at his usual speed, which was fast enough. You could hear Tony roar "MAXIMOFF!", but then you were already outside and in the woods around the facility. It was finally getting warmer, but you were glad about your jacket, especially at this speed. Eventually, after a good forty-five seconds, Pietro stopped.

"What was that?"

"I put salt in his mug."

Pietro laughed. "Why? Oh wait, it's Tony Stark, forget the question." You laid your arms around his neck again and cuddled into his shirt, trying to ignore the dark bottom line of this statement. He might have forgiven Tony, but forgotten? Never. The picture would never leave him.

"Actually for showing you those damned cartoons. Your sis almost killed me with a coffee mug that was intended for you."

"You were there?", he asked. He set you down and held you at arm's length to look at you. Unremarkable face and clothes. Nothing had changed. Two days ago you had decided blond strands would suit your brown hair, but so far, nobody had mentioned it.

"You ran past me when you made your escape."

"Oh. Damn. How do you always do that?"

"Ask Erik and Helen. Besides, I need to be with them in..." You checked our phone. "three minutes."

Pietro laid his arms around you again. "Then we still have time." He kissed your hair and you leaned against him. Damn, you were almost five miles away from the facility and he wasn't even sweating or out of breath. It was quiet here, very quiet. A few birds sang, a soft breeze brushed over you, you could hear Pietro's heart, a steady thump-thump-thump. It was wonderful. You certainly were the luckiest girl on the planet, ending up here for some reason without doing anything.

"I-"

"Meep-meep." And with this, he swooped you up and you were in front of the laboratory. When he set you down again, about thirty seconds later, you were laughing like a lunatic, for no other reason than the usual adrenaline kick running with Pietro gave you. The door opened and Erik Selvig raised an eyebrow at you, as you clung to Pietro's arm. "Did I miss a joke?"

Pietro wanted to answer, but you nudged him. "Come in, before Tony finds you."

"What did you do?", Helen Cho asked.

"Gave him what he deserved," Pietro answered for you. The scientists exchanged worried glances, but didn't ask.

"Agent Oliver, sit down, please," Helen said. "What about you?" Pietro shrugged his shoulders. You could see a new scientist, a girl, bustling around in the background, giving Pietro longing glances.

"Please stay," you said. You kissed him. It felt good. Not that there had been any time it didn't. And it was a very good way to make a point. "Can't risk Tony testing one of his new inventions on you."

Pietro grinned and escorted you to the middle of the room. The medical devices, whatever they were, were attached to something that looked suspiciously like a dentist's chair. You were still a bit uncomfortable, despite knowing the worst that had happened to you so far was having to give a blood sample. "Don't stand in the way," Helen told Pietro.

"Me? Never."

"Otherwise we might get the idea to run a few more tests on you as well." Pietro grimaced, and stayed silent.

In fact, the only thing you had to do was lie still and try to fade, like they were calling it. The problem with your ability was, once somebody knew you were there, it didn't work out anymore. And they still hadn't found out how you managed to fade in the first place.

At least you had something to bring you through these boring hours: Pietro annoying everybody who didn't seem to do any important work and Tony Stark stomping in and asking where the speedster was. Good thing that this was not the Stark tower and Tony didn't have JARVIS with him. So Cho and Selvig ushered the billionaire out of the room, telling him they hadn't seen Pietro since he delivered Olli to them. Tony threw back a confused glance and you waved at him. Then the door shut in his face.

At noon, the scientists released you, seemingly not better off than before.

"For next time, try to check if it feels different being visible or not. Physically," Cho told you. You nodded and left the laboratory behind, hand in hand with Pietro. You just couldn't be friends with that kind of environment. It gave you the chills, despite everybody being so nice.

The two of you had missed lunch, it seemed. You were alone in the room. Pietro got you your favorite, spaghetti and tomato sauce and another one for him. Except his portion was about twice the size of yours. You ate in silence, which lasted for a good four minutes. It was a miracle he didn't get a stomachache seeing how fast he was always eating. Eventually you were finished as well.

"You might want to avoid Tony for a while," you told him.

"Hey, why did you blame it on me in the first place?", he complained. You smiled and wiped tomato sauce off his cheek, his stubble tickling your fingertips.

"Because you can run faster."

"Meep-meep," he said with a grin.

"So, what's up for you today?"

"I got the day off," he said. "Wanda wanted to watch a movie. Wanna come too?"

You hesitated. "Hey, you know what, I'll leave you two to it. Have a little sibling time, okay?" You stood up to put the dishes into the sink. Then somebody grabbed you, and spun you around, your back against the kitchen counter. No chance of escape.

You kissed. Spaghetti. Mhm. You had training with Steve this afternoon, but that was still a few hours in the future. You had wanted to work on your short story. But plans changed.

"When does that film start?", you asked, running a hand through his messy hair.

"Whenever I want to," he purred. "I'm sure Wanda will understand. You know, we could watch a few cartoons."

"Meep-meep," you whispered. He picked you up and you were gone.