James
Takeshi notices Itami's frown. He wonders what's on her mind, but he feels like he should pry too much. They just met, so going into anything personal might look bad. Also, he's not the best when it comes to life advice and who's to say that those sort of words will change people? Those who are younger are greatly influenced, especially if they have to follow a certain standard. Clans can be quite difficult that way... Some of those standards might be due to their Hidens or KKG. It's just mainly the genes and being put at such a high point in society. 

"Correct, Itami-chan. The three ways to get detected have to always be kept in mind whenever you need to be unseen..." Usually, a person is able to specialize in specific type of sensing. Some people can see things that others cannot, while some might be able to smell the most distinct scent in the area. "Of course, there is also sensory but that goes into chakra suppression. Let's keep it simple."

"Hiding is a skill, you usually learn these basics when learning about stealth. These are common ways to trick people. Hiding behind a tree and staying out of sight, masking your own scent by covering yourself in mud or slabbing honey on yourself, and making no noise and slowing down your heart beat. Although, slowing down your heart is quite tricky. A very trained listener will be able to pick that up in an instant if the shinobi is not properly."
Jill
Itami's face, which had reverted to a blank state in tandem with her uttered words, blushed a rosy pink at the term of endearment Takeshi-san used. Itami-chan? When had she ever been called such? Even her mother and father never willingly used such affectionate honorifics, much preferring to use "Daughter" Or "Musume," Depending on the formality. Likewise, the estranged girl used father and mother or otou-sama and okaa-sama, equally dependent on how stately the circumstances were. Her blush faded and she frowned, but unlike her previous expression of displeasure this one was far more rooted in sadness. What she would give to have had a closer bond with the family she let go of.

But the exiled Uchiha shook her head lightly, losing her blush and choosing instead to focus singularly on Takeshi-san's teachings. Chakra suppression and sensory were terms that were at least passingly familiar to the girl, though even that was more due to her own scholarly interests than any academic teachings. The quote-unquote "Common ways to be stealthy" All made sense to Itami, more or less confirming what had been instructed to her in the academy, though the fact that one's heartbeat could be slowed for the purposes of avoiding audible detection was highly fascinating. Did such an act have any effect on the respiratory system? Could holding it too long result in cardiac arrest or lack of oxygenation in the blood? If not, was it a skill that slowed cellular metabolism simply to allow one to avoid death?

Internally, Itami scoffed derisively. While merely hypotheses, if even partially true such skills would undoubtedly help in healing and more benign scientific studies. Instead, shinobi chose to use this knowledge for — what else than — combat. 

"Could a properly-trained shinobi not learn to listen for a slowed heartbeat?" Itami asked, blatantly curious. "Or is the space between beats so large that it is either irrelevant or enough time to properly execute an ambush without sound affecting their own actions whatsoever?"
James
Takeshi holds back at a chuckle at the Uchiha's reaction to him calling 'Itami-chan.' He's guessing that the girl isn't used to such a thing, but she is younger than him so he'll keep calling her that. Also, he's always been one to somewhat tease people. People wont recognize it, but it's quite fun to him from time to time. It's one of a couple things that allows him stay sane... That and his morality. Honestly, he's surprise that his morality has stayed intact for so long now. 4 years and a war would do something to a shinobi, but he hasn't been affected as much as others could have been. Although, that cave mission did put some impact on his mind. That day felt so cold and lifeless. 

"Honestly, it's more of something that they can just hear through continuous training of the ear. It's like a development thing with the body," Takeshi states. "Although, someone not specialize in hearing might not be able to hear certain details than others. There's a technique that completely that supposedly stops a person's heartbeat, The Corpse Stance. The Corpse Stance is arguably the pinnacle of stealth."

Stepping away from the Genin, Takeshi walks along the area of the environment. He walks over holes and takes in the air. Such nice weather. 

"Also remember that you should use your environment to your advantage. A skilled Shinobi can easily sneak up on you this way... However, it's also the best way to treat a comrade in need. Acting as support, a shield, that no one can see is a changing factor in the field."
Jill
A cool wind gently gusted through the glade, rustling each leaf on every tree in a slightly different way. Reflecting on Takeshi-san's words, Itami likened a stealth user to both the wind that blew and the leaves that shook. From what the jōnin plainly stated, it was a primarily supplemental option that could aid in both offensive and supporting roles — an assassin's blade or a shield from the shadows. Itami rather liked the latter idea; as much as she abhorred violence in all forms, she would much rather protect an ally and incapacitate an opponent without giving them a chance to strike back simultaneously than simply cast an illusion and hope for the best. The exile knew very, very well that there was always a bigger fish in the river — there would come a day where she was outmatched in the art of that-which-pretended-to-be-real, and having other helpful options was nothing more than a boon in the strictest sense.

Itami's eyes followed Takeshi-san as he walked around, surreptitiously stepping over holes with such grace and nonchalance that the girl was impressed even by such a simple action. Was this the passive skill of a jōnin? To carry with them always the poise of the finest dancers, the posture of the most elegant nobles? It was something the banished Uchiha could not quite comprehend. Would she ever reach such a skill level? Or would her abilities reach a ceiling far before she could ever hope to match Takeshi-san? Itami didn't know. Itami disliked not knowing things when she thought she should, and she certainly thought so now.

Overhead, the girl spied, the winds were bringing in the cover of clouds. They were so large, titanic constructs of evaporated water precipitated out of the air due to its lack of atmospheric density, in a relative sense. Takeshi-san was akin to those clouds: an unreachable, unfathomable expanse; a tactile sensation the wayward scionness could only hope to touch one day; a truly gigantic force of nature that utterly dwarfed her very being. 

If Takeshi-san was a cloud, a nasty part of Itami's mind wondered, what did that make her father? The exile feared Takeshi-san as much as she feared anyone else — that is, not too much but not too little either — but there was no one Itami feared as much as her father. If Takeshi-san was a cloud, perhaps Uchiha Ten was the sun or the moon or the stars. Not for his strength but for what he represented.

The girl didn't voice a response at first, trying in vein to open her mouth in order to formulate words — but to no avail. Finally, after what felt like hours to the suddenly-anxious genin, she spoke but two words: "Thank you." 

To whom they were aimed was unclear.