In carrying out his normal patrols he had noticed something that normally wouldn't merit his attention; a genin was leaving the village alone, Dunki or something like that if the records of personnel was kept accurate. Not having had special edict from the Mizukage that could mean only a few things. Now normally something like this wouldn't be worth his time aside from using it as a threshing for newer members, he would just note the direction they left, and possibly follow for a short time to confirm the destination. What got his attention was another person following at a distance. If they were accompanying each other then it would be a moot point and leaving the village would be nothing to even raise an eye at. Given the following one's actions it honestly seemed like he was planning on hunting the rogue! This escalated it's importance. While one genin going rogue was a mild problem for they wouldn't amount to much if they were rebelling against the village, but if a loyal genin were to die in service of the village that would true be a loss of potential.
Following behind the tracker for several hours trying to keep hidden more from him than the rogue was made easy by his chakra suppressing armor, and the large gap in skill difference. Of course it wouldn't do for anyone to see him so the proper measures were taken. He wore the mask after all, no fooling around with that on. When his "charge" finally decided to play his hand his real duty began. It would be best to see what the kid could do on his own and let the accomplishment be unspoilt by outside assistance, but that could all go to hell if the battle was to go badly, and of course would merit stepping in. Deciding there and then that the kid would get no help if he couldn't take down his target by himself, he would have to live with the shame of letting the rogue go.
Throughout their fight he noticed that the ice that the kid used seems to be of high potency, and the way that it was used was very skillfully done. His tactics in battle were not flawless obviously from the wound that the kid received in response to his own attack, but the attack he judged as non life threatening so there would be no intervening yet. Several times during the fight he relocated his hiding location to better observe and possibly intervene confident that his skills and the distraction of the battle would keep him hidden.
The girl Chunnin that remained out of the fight was interesting, he had personally heard of her outside of the personal documents; a Hinode and naturally a medic. She could prove to be useful if on the off chance he failed to block a critical strike. And judging from her actions she seemed to be doing similar to himself: watching. And sense her intentions seemed to be clear, as well as her rank giving her the privilege to move on her own he was content to let her act on her own accord.
With the fight reached a conclusion with the rogue surrendered to save his life, he deemed that it was about time to show himself finally with the Hinode seeing to the wounds. Retreating a small distance to ensure that even the most perceptive saw that he arrived from traveling at speed instead of walking out of a bush like a stalker, he entered the field with a flash of speed and the deliberate sound of his feet hitting the ground to signal his arrival to the Kirigakure ninja. Enacting his mask's ability to change his voice, and his armor's distinct characteristic look of every anbu to hide his own identity. Not even his signature hair would reveal him for the mask he worse covered it with a brown wig like piece. Letting his mask and his armor speak his obvious identification, he delivered his dictations in a voice that would be impossible to trace back to himself " Reitou of the Aisu clan, you are instructed to present yourself at the Mizukage's office for debriefing on this incident. I will ensure he" Pausing to motion with his hand towards the wounded Dunki " will be returned to Kirigakure for his punishment. "
Addressing the medic he barely asked and more instructed with the same voice " Please see to it that Reitou returns to the village with no lasting damage." before he then hoisted up the wounded genin and placed him over his shoulder. With a threat directed solely at his passenger " Any further defiance will be met with extreme force, you have been warned." He left the clearing with good speed to return to home, pausing to only slightly nod to Reitou that showed the slightest hind of acknowledgement for his actions.
In all his appearance lasted just long enough for him to deliver his instructions to all, with is feet leaving the ground just a moment after nodding. He was confident that his anbu demeanor was perfectly in line with anbu procedure and the impression he was aiming for was given. All in all today was a productive day.