(Pov 3rd)
Satoru had been confused recently; despite being so young, he was developing quickly due to the Six Eyes he had inherited. The reason for his confusion was that the clan members who usually worked around him had been moving in and out much more than usual. He had overheard talk from the various members about a baby coming, though he didn't fully understand what that meant. Despite this, Satoru didn't care much about whatever was going on that didn't involve him, and despite the early advancement, he was still young, so he was quickly distracted.
Later, though, Satoru would be introduced to someone who would change his life permanently. While playing with his favorite toy, one of the clan members who watched over him came in, but they were carrying a strange bundle in their arms. This member was Gojo Toshino, a lower-ranked member of the clan with no technique and limited cursed energy; he had only been able to reach semi-grade 3. As such, he spent much of his time within the clan's compound, and he considered it his honor to be tasked with watching over the Six Eyes user. Toshino had grown up with an older brother, Gojo Shintaro, who helped guide him while they both grew up before Shintaro was killed during an exorcism gone wrong. Therefore, when he was handed the younger brother of the Six Eyes user Gojo Satoshi, he knew that he should do all in his power to foster the same kind of relationship he had with his older brother.
"Look, Satoru-Sama, this is your little brother; he'll support you when you become clan head, so make sure to be a good big brother and keep him safe." He wanted them to get to know each other right away to make the most of their bond. Their roles in the clan had already been decided from the moment they were born: Satoru with the Six Eyes and Limitless would be the clan head in the future. Satoshi, on the other hand, would be raised to support Satoru in everything to give his life should the clan need it, and Toshino wanted them to be more than just pieces of the clan's strength; he wanted them to be family.
So he was very happy seeing the way the two brothers looked at each other, Satoru taking his little brother's hand, and Satoshi had fully stopped crying when he saw Satoru. He knew they would be there for each other and that these two brothers would be close.
(Pov Satoru)
I had been playing with my favorite dinosaur toy when Uncle Toshi brought the little bundle to him and set it down, and I didn't know how to react at first. It was a little pudgy thing, and it had been crying a lot when the door first opened, but then I was told he was my little brother. I knew some of the older members of the clan had siblings, but I never thought too much about it. Now, seeing such a small body and that he looked at me with such focus, I couldn't help but want to hold him closer.
"Uncle Toshi, what do I do with him?" I asked as though I wanted to be closer he was still a weird tube of blankets and pink skin.
"Well, there's not much. He's still little Satoru-Sama, but he'll be your closest companion later, and since you're older, it's your duty to watch over him." Uncle Toshi explained
"My duty?"
"Yes, Satoru-Sama, you must make sure he is safe, that's what older brothers do for their younger siblings, understand?"
I thought about it for a moment, but when I looked at his little face, already closing his eyes yet still squeezing my fingers, I knew my answer right away.
"I'll be the bestest big brother ever." I declared, and Uncle Toshi smiled, so I knew I had figured it out.
While holding my brother, I could feel our connection and knew that no matter what, I'd keep him safe and make sure we both had a good life.