Tag-Team Part 1
Minato and Kushina are 14. They just became Jōnin. As Chuunin, they were always teammates and were the only two-man team the Hokage allowed only because Kushina threatened to prank him every day until he allowed it. They are currently called Lightning and are one of the most famous teams in Konoha, aside from the Sannin, but under the Hokage's orders, they have not allowed their identities to be known, though any shinobi in the village worth their salt knows who they are.
Though they get into arguments occasionally, they have never seriously physically fought with one another, not even in a sparring match. The closest they've come to actual combat with each other is testing the effectiveness of a new Taijutsu move or Kushina losing her temper and punching the closest thing, which is occasionally Minato. Both refuse to fight the other.
Even though they are full-fledged ninja, they are still 14; naïve, childish, and immature. Nothing like the other prodigies in the series because they have each other.
(MINATO AND KUSHINA)
"Please, please, please, please, please, pretty please!" Minato and Kushina begged, crouching on either side of the Hokage's desk in the mission assignments room.
The Sandaime stubbornly ignored them and handed a mission scroll to the Chuunin team watching him with more than a small amount of pity. Even if they held little respect for the two barely-teenagers-turned-Jōnin, they acknowledged the duo's ability to get their way. In everything. As the Chuunin team walked out of the room, the Hokage lost his last scraps of patience.
"The two of you are barely Jōnin. No matter how great you tag-team is, I'm not giving you an S-ranked mission!"
"But we want to do it!" Kushina protested.
"Our skill set is close to perfect for the mission and you know it," Minato reasoned.
"You're fourteen! I'm not going to send you into the Bloody Mist."
"We're ninja, not children! Besides, we've been on a B-turned-S-ranked mission before, when we were Chuunin, and completed it. You can trust us, Jiji!" Kushina protested.
"We've hardly done anything but B-ranks since we became Jōnin. We can handle it, Hokage-sama."
"I don't doubt you. I think you can finish this mission spectacularly, but you're still fourteen. If your identities are found out, which is a high risk on this mission, the image of Lightning will be ruined."
"But Jiji!"
"From a tactical standpoint, there are two other teams suitable for this mission. One team is temporarily split due to injury and the other is on a mission elsewhere, not due to return for another two weeks."
"I really don't like it when you read the mission assignments, Minato-kun. You're not supposed to have access to those."
"Hyuuga-sama said I could be head Jōnin after he retires in a decade or so. He lets me read them!" Minato protested. "You're changing the subject! The mission has to be accepted or declined in the next two days. Kushina and I are finishing a week of leave, so we are perfectly suited to carry out this mission."
"Really now? Just because your skill set and status is suitable, it doesn't mean your age or methods are."
"Hokage-sama, I intend no disrespect by reminding you that we are ninja. Our methods have no boundaries and our age has no weight in your decision. This is not an infiltration mission. We will not be seen. Our skill and status are the only factors in this decision. Your only other alternative would be to send one of the ANBU, but their forces are spread thin and cannot take this mission, considering there is only one in this room guarding you and there hasn't been a single ANBU guarding Kushina in three weeks. Konoha can use the funds, especially in regards to the Chuunin exams, which are to be held in Konoha exactly four months and six days from now," Minato crossed his arms, sensing his victory.
The Hokage pinched the bridge of his nose. "The rest of my children better not grow up as troublesome as those two," he muttered under his breath, but not quiet enough to escape the duo's hearing. They smirked at each other, more than a little embarrassed. "You shouldn't have access to any of that information, Minato-kun."
"Besides, me and Kushina have practically lived in your sealing room for the past week because you won't let us practice sealing anywhere else. Just because we're too young for infiltration and espionage missions doesn't mean we don't have any skills in the area."
"For that I should court-martial you for accessing information above your rank."
"The court-martial is just a formality and we'll only be promoted afterwards for actually being able to access it."
"Minato-kun—"
"If you don't want us getting information from the village, you could always send us on the infiltration mission into the trafficking ring that's been working through the villages a few miles away from Konoha. Fugaku submitted the mission request and we are officially the only team eligible so I'm sure he'll request us if I ask him. We can settle for the A-rank and take a different S-rank later."
"Of all the filthy tricks for you to pull, you chose that one. I should suspend you for blackmail."
Kushina shrugged. "We really want an S-rank. The other Jōnin keep teasing us about being kids so we gotta prove we're as good as them."
"Let me get this straight: you've been pestering me for high-ranked missions because of a little teasing from the other Jōnin."
The teens exchanged a glance, speaking in unison. "They try and do our mission reports for us and don't let us turn them in without help and they try and they always insist on walking us home and take all the good missions and won't train with us and keep insisting we're late for class at the Academy." Their words split into different run-on complaints, mostly about name-calling.
With a weary sigh, the Hokage put a hand on their heads. "That's enough."
They stopped speaking immediately.
"First off, they're only giving you a hard time because you're new. One or a dozen S-rank isn't going to change anything."
"But Jiji! They're being mean and they won't even listen when Minato tells them so!" Kushina whined, poking at the Hokage's side and pouting.
Minato nodded in agreement.
"So will the two of you stop pestering me for missions I don't want to give you?"
"We still want the S-rank," Minato deadpanned.
The Hokage's head fell back against the back of his chair with a loud crack and the ANBU guard stifled a laugh.
"Please, please, please, please, please, pretty please!" The two begged, tugging on his arms.
"If both your senseis from when you were Genin say yes, you can have it. If not, then you're not going to pester me for anything higher than a B-rank until you're eighteen, got it?"
"No promises!" Kushina called over her shoulder as they raced out whooping.
The Jōnin outside stumbled out of the way as they zipped past and split in opposite directions to find their senseis.