I know 'Anko's prank backfires' is a Naruto trope that's probably been done to death, but it gets the job done.

Edits: Small extra Anko POV, and the report is streamlined to better fit the edited previous chapters.

Probation Month No.2

Stolen Breath

Shinobi are notorious gossipers. After all; information withheld could spell someone's demise, so any and all information is shared out to pretty much everyone. That the information happens to be the incredibly entertaining bits is a complete coincidence, honest, cross their hearts, nothing to see here, absolutely no blackmail potential at all.
Needless to say, the arrival of Kimimaro Kaguya and Juugo of the Scales made it round the gossip circle faster than you could say 'nosey bastards'.

Izumo and Kotetsu were the first, sharing the news of the day with the rest of the Chunin lounge. The mention of the name Kaguya had rung a few bells and at least one person had hit the library and come up with the info that the Kaguya were a presumed recently extinct clan from the Land of Water.

The TI staff had contributed, saying what they were allowed about the two refugees. The news of a new Kekkei Genkai in the Village spread fast, as well as the fact they were running from Orochimaru.

The Jonin lounge got much the same amount of information, but the ANBU barracks were a different story. Security recordings from the TI cells were viewed and passed on, as well as the transcript of the council meeting and the medical files. As well as that, the news was that the ANBU Watch for the two newcomers was the Copy-nin himself and his kohai, Tenzo of the Mokuton. Murmurs of 'half-duties', 'red flags' and 'psyche report' floated around the groups of white masks.

Of course info was all well and good, but nothing beat confirming it for yourself. So the apartment block housing the two boys became the most-watched location in Konoha for a whole month. That the Kaguya was on amiable terms with the Hokage spread fast, but it was the spar in training ground 2 that set everyone buzzing(literally, in the case of the Aburame).

It had long been rumored that the Kaguya clan had a body-altering Kekkei Genkai, but this was solid proof. Although, a few of the more squeamish Chunin had felt slightly disturbed by the ease at which the boy removed his own bones. Those who were close enough to hear the squelching of wet flesh were rather unsettled. The boy was so young. Although, given Orochimaru's pursuit of prodigies and bloodlines, was it really all that surprising?

It was the Juugo boy who gripped everyone's attention though. The shapeshifting was completely unprecedented, as well as the apparent mental side effects and lack of control.

Those who did watch the apartment afterwards were slightly disappointed. They seemed to be normal children, albeit mature, living a vaguely threadbare existence while adjusting to a new place. The constant use and doodling of seals made interest pique for a while; the shinobi who muttered he was grateful they had a seal practitioner on hand should the worst ever happen, was quietly shushed.

Juugo spent most of his day bird watching, seemingly having a strange affinity for animals and even holding conversations with them. Kaguya spent his time writing in notebooks or calculating a budget while teaching Juugo basic math, reading and kanji.

Interest died down, but at least somebody thought it prudent to warn one Anko Mitarashi about Konoha's new residents when she got back from her long-tern infiltration mission, a few days after the first month ended. Unfortunately, they forgot that Anko had a very different sense of tact to most shinobi. And they didn't notice how her eyes sparked mischievously.

There's a sound of hissing and suddenly oh godohgod he'sfoundme as snakessnakeshissingcoiling, squeezingarmstrappedtrapped can't move notagainnononono snakes look at me goldsliteyelikehis he'sherehe'scomeforme. Woman, stranger. Shouldknowcan'tthinkhe'shereformeohgod. Whereishecan'tseehimsnakeseverywherenonononononononono...'

At first, Anko smirked in amusement as the kid started then froze as her snakes coiled around him. Her smile shrank rapidly as the kid's face paled and his eyes took on a glazed deer-in-front-of-a-katon look, instead of him getting himself free and calling her out like she had intended.

She came out from her hiding place and stepped in front of him to get his attention. He didn't even notice she was there. In a horror-struck split second she realised that his breathing was rapid and his lips were flushed blue, before his eyes rolled back in his head and he slumped.

Immediately, two ANBU were at his side, slashing her snakes to make them dispel and lowering the kid to the floor before one snapped to the other "oxygen deprivation; oxygen bubble, now!"

The other promptly held his cupped hand over the gasping mouth and summoned a sphere of green medical chakra. The half-conscious boy sucked in the suddenly oxygen-rich air gratefully as the first ANBU gradually pulled him into a sitting position.

Anko's stomach felt like it was floating somewhere in the region of her ankles. She hadn't mentioned to scare the kid; okay, she had, but she hadn't wanted to scare him out of his wits! She knew the Kaguya had spent time with her bastard of a sensei, so she had realised that the snakes would be associated with him, that was the point of the surprise; she didn't knew that they'd trigger a flashback that severe!

"Kimimaro!" It was the other kid, Juugo, as he burst through the door, skidding to a halt as he spotted his friend insensate and being cradled by an ANBU. His eyes locked on her as the only stranger in the room. She barely dodged the fist that came at her. Good thing too; it left a small crater in the wall.
"What did you do!? What did you do to him!?" His voice was gradually becoming more garbled and feral, black marks creeping across his face like the insidious tendrils of some deadly vine and staining his eye black and gold. More vines, real this time, burst from the floorboards and entangle him, pinning his arms to his sides and fastening his legs to the floor.

"Shit...Juugo...'"

The voice was quiet, and a little strained, but it broke through the tension like a hot kunai through butter. The Kaguya kid was sitting upright under his own power, but still flanked by the two ANBU. Juugo halted his struggles as he caught sight of him, but the markings still remained. The kid carefully got to his feet and cautiously walked over to his foliage-covered friend. He placed a hand on his shoulder and the markings retracted and Juugo relaxed.

The vines and branches retracted too, and it was then that Anko noticed them for what they really were. 'Wait, Mokuton! Buddha's balls, did the Shodai leave another descendant?' She saw the ANBU with the red-and-green striped mask lower his hands from a seal at the exact moment the floor returned to normal. So, he was...'

"Bloody knock next time."

Eh? Oh, it was Kaguya who had spoken. She couldn't really blame him for that remark, not after what just happened. Juugo was stilled as he felt Kimimaro bury his face in his shoulder blades so his face was hidden. "Just go, okay?" His voice wavered slightly, and Anko took that to mean she had far overstepped the line onto private, emotional matters. Time to make herself scarce; she jumped out of the window.

Juugo turned slowly, not wanting to dislodge his friend, but Kimimaro stepped away while heaving a great, shuddering breath. "I'm fine," he stated as he preoccupied himself with smoothing out the wrinkles in his shirt. "Just got caught up in a few old memories, that's all."

"Memories don't tend to make people collapse," Juugo said, leaving a way out of the conversation for Kimimaro who very obviously didn't want to discuss these memories.

"I panicked," Kimimaro began. "So I started breathing faster, because your body wants more oxygen when you panic in case it has to run or fight. But when I panicked, I'd grown a sheet of bone under the skin of my bone and chest to protect my organs because of habit. It restricted my breathing and I passed out from lack of oxygen. That's it."

"Do you need to rest?" Juugo asked tentatively. Surely a shock like that would mean he wouldn't be in any state to concentrate for the rest of the afternoon.

"No I...," he paused and thought for a moment, a distant look flashing in his eyes. "I'll just sit in my room for a bit."

Juugo watched the smaller boy walk to the bedroom and shut the door behind him. Kimimaro had done so much for him, but when something happened, he was helpless. If his friend had choked to death on the floor, killing that woman wouldn't have brought him back. He should have assisted the ANBU, not done something so pointless. Kimimaro had asked him to watch his back and this was all he could do.

"What memories was he talking about?" Asked one of the ANBU. He considered them for a moment. He could always sense them somehow so they could never get the drop on him, which was why he could relax with two strangers following him around. Kimimaro couldn't sense them, yet he never seemed too bothered by either of them. If Kimimaro trusted them like that, he would tell them what they wanted to know.

"No specifics," he said. "Though it's very likely they're from his time with Orochimaru. And there's one thing that gets me about what just happened," he realised suddenly. "Kimimaro grew bone under his skin the minute he panicked, but didn't try to fend her off. Why would he do that, unless he was used to not being able to use his hands?"

The two ANBU glanced at each other, hands flashing into signs, before the white-haired one shunshined away. He could guess that the ANBU had put together what he had. After all, Kimimaro had shot down all of his questions about the Y-shaped scar that ran vertically down his chest and torso as well.

"Mitarashi."

Anko closed her eyes in resignation. "I screwed up bad, didn't I?" She should apologise, she wanted to; that was why she was dithering about on the kid's rooftop. But he probably didn't even want to look at her now.

"That's one way of putting it," the hooded ANBU who had his chakra signature tightly masked, scoffed. "In fairness, his Kekkei Genkai does allow him something of a cheat when it comes to mental stability, but it has limits and he is aware that he has trauma. At least we all know now that snakes are a trigger." A pause. "He's not angry at you, just upset. Not that it wasn't shitty, what you did. But he's willing to let you apologise, eventually. Be thankful that he doesn't have a hateful bone in his body- pardon the pun. In the meantime, I suggest that you go home and think about what you've done. We'll contact you when he wants to talk to you."

Report

Kimimaro Kaguya(referred to henceforth as K.K) possesses a Kekkei Genkai known as Shikotsumyaku that nullifies Yamanaka mind-probes. As such, this report is compiled entirely from observed behaviour.

Please keep in mind that Shikotsumyaku also has some mitigating affect on mental and emotional trauma, though it does not negate it.

K.K is efficient and pragmatic about killing, focusing more on protecting those he cares about rather than the act itself. However, this pragmatism as well as his skill in developing and utilising Fuuinjutsu means that his mind can drift from classifying 'target' to 'acceptable collateral for experimentation'. A quality sought for in shinobi, yes, but requires more finesse and control. Socialization should be commenced ASAP; suggestion to start with adult, mature shinobi before adjusting to K.K's own age group.

The singing is most prominent. No one recognises any of the songs, leading to the belief that they were made up by K.K or an acquaintance, who K.K then learned them from. The singing is not a tic of nervousness or boredom, but purposefully engaged in when unoccupied. Either to occupy his mind or to provoke a response from those around him.
Given the amount of isolation suffered during his early years, the need for audial stimulation or attention most likely manifested this way, but grew more infrequent when he moved to a more stimulating environment. A relatively harmless habit, though best if encouraged to die out, given the risk outbursts of noise can pose in combat zones.

From observations by ANBU Hound and ANBU Bear, K.K seems used to taking charge and acts in a mature manner. A different manner than the socially stilted one usually displayed by shinobi prodigies and children forced to grow up too soon. He has an awareness of his own personal limits and tolerances usually seen in mature Chunin, but still retains a curiosity typical to his age group, if a far more deadly and grounded approach than most. Probably comes from being a literal living weapon.

When speaking to authority figures(e. Hokage-sama, Clan Heads, etc.), K.K is formal. This politeness is born out of wariness, not loyalty. Although it is possible that part of it is now from gratitude. Conversation also revealed that K.K finds it normal to be under constant observation, as if expecting to be evaluated.

An altercation with Anko Mitarashi(see incident report attached), revealed that certain triggers can cause panic attacks, presumed to by linked to the various scars on K.K's body(see medical file). K.K refuses to discuss the events that resulted in such scars.

Signed,

Inoichi Yamanaka

Ibiki Morino

Hohetou Hyuuga