Inuyasha was having an outing with his okaa-san in a field near a human village. Energetic little child that he was, Inuyasha had run a distance away from his mother and was chasing a rabbit. Not paying attention to where he was heading, the young Inuyasha wandered even closer to the human village without realizing it. The next thing Inuyasha knew, rocks pelted his skin as he tried to protect his head from the sudden barrage of stones. Through the pain, Inuyasha could hear his attackers yelling. It's a demon. Kill it. It's a monster. The young Inuyasha, because of the physical and emotional abuse combined, became enraged beyond reason. Growling, he rushed forward and before the group of humans surrounding him knew what happened their comrades were lying in a pool of their own blood.
Sesshoumaru arrived to see Inuyasha giving chase to two humans in the direction of the field. At the time, the younger Sesshoumaru's eyes had widened at the carnage caused by his brother. Catching up to Inuyasha, Sesshoumaru found him sitting on his haunches, eyes glowing with violence. The two humans, a child and a man, were both dead. In the moment Sesshoumaru had taken to glance over at the bodies, Inuyasha attacked. Surprised, Sesshoumaru evaded Inuyasha's claws and called his name. Not wanting to hurt his half-brother he tried to calm the boy down by calling his name. When calling his name had no effect, Sesshoumaru thought it would be prudent to knock the boy unconscious before he hurt himself. Although young, Sesshoumaru was the elder as well as a full youkai, and so, easily managed to hit Inuyasha. Inuyasha released a scream of rage that brought his okaa-san rushing towards them. When she arrived, it was to find Sesshoumaru holding onto Inuyasha's arm and slamming the smaller boy into a tree.
The woman had rushed over to the now unconscious boy and scooped him into her arms. Casting a fearful look at Sesshoumaru, she ran quickly towards the castle as though the boy would try to kill her also. The youkai looked at the bodies of the humans once more in distaste, after all, they did attack and try to kill a youkai. But otou-san says that we should try to get along with the humans although they are different. Sighing, Sesshoumaru delivered the bodies to the entrance of the human village so that they could take care of their dead. Heading back to the palace, Sesshoumaru wondered if otou-san knew what had happened yet. Otou-san would not be happy with what happened, as he didn't tolerate killing humans unless it was absolutely necessary.
Upon his return, a servant informed Sesshoumaru that he had been summoned to the throne room by his otou-san. On his way to the throne room, Sesshoumaru wondered how the brat was doing. He had nothing against the Inuyasha, but the boy seemed to be spoiled by his mother. Although the human woman had been married to the Taiyoukai for six years now, Sesshoumaru had no liking for her. He couldn't quite put his finger on what exactly it was about her that he disliked. Although his otou-san had a liking for humans, from what Sesshoumaru had seen of humans, they were a distasteful lot. Many offended his keen sense of smell and more oft than not, were lacking in intelligence.
Approaching the throne room, Sesshoumaru pondered upon his relationship with Inuyasha. When the hanyou had come into this world, he had disliked the cub. He had no need for another shallow being living with them. When possible, Sesshoumaru had done his best to avoid both mother and son, only appearing when his presence was requested by his otou-san. But as fate would have it, he had found a five years old Inuyasha crying because his favorite ball had rolled into a cave. Sesshoumaru had taken one look at the small crying face and sighed inwardly. At least the boy had enough sense not to wander into a dark cave on his own. Killing the demon that was playing with the lost ball, Sesshoumaru returned the ball to the hanyou. To his chagrin, from that day on the cub had taken to following Sesshoumaru around. The cub's constant hovering was an annoyance but Sesshoumaru found that the hanyou was not as dumb as he had thought. Slowly, Sesshoumaru found that Inuyasha grew on him and he found that the boy was tolerable.
Looking up, Sesshoumaru realized that he was standing before the doors of the throne room where two stone statues of legendary inuyoukai stood in their true, majestic forms. Entering the throne room, Sesshoumaru bowed to the inutaiyoukai, his father. Next to his father, the human woman cast fearful looks at the young youkai, as though he would attack her at any moment. Giving her a cold look, Sesshoumaru watched as the woman shifted closer to his otou-san without expression. Inuyasha wasn't present, but the condition he was in, Sesshoumaru didn't really expect him to be there.
"Sesshoumaru. Did you attack your brother?" At the taiyoukai's nod, Inuyasha's okaa-san grabbed otou-san's hand and held on tightly. "Explain to us what happened today."
"I arrived in the field by town to find Inuyasha giving chase to two humans: one old, one young. As I had just arrived on the scene, I was unable to do more than watch as he ripped them apart with his claws. As soon as I had gotten near Inuyasha, he attacked me. And the rest, I'm sure his okaa-san has already told you."
The taiyoukai's eyes widened almost imperceptibly at the words but it was gone in a fraction of a second. As it was, Sesshoumaru was told that Inuyasha would recover when he awoke but nothing was explained as to why the hanyou had turned suddenly vicious. Shrugging it off as otou-san's business, he had not given it any further thought. From that day on, Inuyasha's okaa-san always shrunk away from Sesshoumaru's prescence and stayed glued to otou-san's side constantly. The human woman's view of Sesshoumaru did not concern him, but otou-san wasn't happy about the situation. But as fate would have it, not two months later otou-san was mortally injured by the dragon youkai with a body of steel, Ryuukotsuei. It was at that time that Sesshoumaru received Tenseiga and it was most likely that it was also then that otou-san used the last of his strength to hide his grave within Inuyasha's eye. Soon afterwards, Inuyasha's mother, unable to stand being in Sesshoumaru's presence any longer, left the castle. The human had left in the dead of the night, taking Inuyasha with her.
Sesshoumaru had known the woman's plan but saw no reason to stop Inuyasha's okaa-san as he had no real liking of her. The youkai followed the fleeing woman silently as she had chosen to leave at such a bad time, solely because there remained a sense of responsibility towards Inuyasha. Their lands were surrounded by many demons trying to take advantage of the death of a taiyoukai. Anyone with common sense would realize that right after the death of the ruling demon of the land, chaos would rule, and yet the woman had chosen this time to run. Sesshoumaru watched in exasperation. The foolish woman was asking directions from a demon while Inuyasha clung to her skirts. The hanyou probably sensed something was not right but was not old enough to know what it was. Suddenly, the cub let go of his okaa-san's hand and ran slightly ahead to where Sesshoumaru was watching them. Sniffing his small nose he carefully sniffed the air as though he smelled something he recognized. Turning suddenly, the hanyou growled at the demon disguised as a man and pulled his okaa-san away from the youkai. The man smiled evilly before dropping his false form as fangs appeared and his nails lengthened to become claws: a wolf youkai.
"Run Inuyasha. Get out of here." Inuyasha's okaa-san had picked up a log and had pushed the hanyou behind her. "RUN."