Dorothy
"Sounds like a curse to me. Sittin' around is one o' my favourite activities, least when I can't be arsed for anythin' else," Nagiha huffed to herself. The kid seemed nice enough, in that way that most genin were. Wide-eyed and ready to listen to whatever it was that their seniors had to say. Not usually a bad thing, though.

"That's true enough. Though, I'd say speed's pretty do-or-die among higher rankin' Shinobi... Lots o' people are quick as a bolt, plenty more peter out eventually. I'm in the latter, I reckon," Nagiha would explain. With her current progress, she was quicker when her feet weren't even on the ground, thanks to the potency of gravity ninjutsu. "Nice to meetcha, Shinpi. I'm Nagiha." No family names, and Nagiha didn't mind that. Her lowly little clan didn't need any of that nonsense.

He gave another crack at it, and Nagiha watched again as he weaved and dodged. The problem was, once more, the quantity of the obstacles - dodging one often just left him in too difficult a position to dodge another. Leaning against a stalk of bamboo, Nagiha pondered for a moment, before speaking up.

"Ya don't wanna move too much when you're dodgin' things in your way. Just as much as you need to," Nagiha would call out, "Move too much, and ya won't be ready for what's next. Ya practically wanna feel like you're weavin' *Through* An obstacle, not around it. Give it another crack."
Chad
Shinpi pushed himself back up, now sitting on the ground. *Well, Nagiha was right about that at the very least-* The boy thought to himself, ignoring the soreness as best as he could. His breathing was getting heavier at this point, though he still seemed ready to continue. "I've never been much for sitting around, I get way too bored, gotta move y'know?" He realized the irony of his statement and pulled himself up by grabbing the bamboo that had previously knocked him over.

"Nagiha's a nice name, I like it." He chuckled. It seemed to fit the Chuunin's personality well, Shinpi briefly wondered how it was spelled. The thought was cut short though, as Nagiha began explaining what exactly he was doing wrong. He nodded enthusiastically and tried to take the advice to heart. It sorta seemed like what he was doing while practicing his reflexes with Jaga.

After Nagiha was finished, the boy steeled himself for another attempt. "Alright, I'll try to keep that in mind, here we go!" And with that Shinpi once more broke off into a sprint. *Only use as much movement as you need to, only use as much movement as you need to-* He repeated in his head like a mantra.

To his credit, it seemed like that advice was certainly helping him out. Bamboo shoot after bamboo shoot was maneuvered around, each of them missing the boy by a hair's breadth, so close that his clothing was brushed away by the bamboo more often than not even though it didn't touch his skin. His relatively small stature made it pretty easy to shift his weight on a dime, but previously he ended up moving too much for that same reason, as Nagiha told him. 

Eventually, Shinpi managed to circle back around through the thicket and back to the Chuunin, skidding to a halt in the dirt. "Alright! I think your advice worked! How did it look?" The boy asked, giddily bouncing on his toes. He was still a kid, after all.
Dorothy
He took her advice well, advice Nagiha applied to her own movements often. It came easy enough to her, though - sand was known for flowing, after all, and had quite the strong connection to sand.

"Not bad at all. Ya ain't too big, so if ya keep that quality o' movement, you'll be able to slip through just about anythin'. Next, though..." Nagiha grinned lightly at the excited young Genin, thinking how to cap off this little training session. 

"Next ya just gotta work on pickin' up the speed. I'll give ya somethin' to chase, so keep up if ya can."

To finish things up, Nagiha would get herself moving too, giving him something to follow. Though, in a somewhat unorthodox manner. The Sabaku girl would suddenly kick off the ground and begin, well... Floating. Lighter than a feather, and much more swift, she'd kick off bamboo and dart ahead to be Shinpi's target for one last chase, flowing through the bamboo as her now unnaturally light body flowed ahead.