Name: Sabu Okamoto
Other Aliases: None
Date Of Birth: 02 - 04 - [Redacted]
Rank: Sergeant
Other Notes: Student at Nijigasaki Academy, where he is a childhood friend of fellow schoolmate, Ai Miyashita, who is a member of the Nijigasaki School Idol Club

Bio:
Sabu prefers to keep his childhood a secret, but he made it clear that he was friends with Ai. Back when they were little kids, Sabu wasn't exactly the most outgoing person in their elementary school. Ai had some friends at the time, but she couldn't help but pity him being so lonely. So, she opted to befriend him and bring him into their group, and to their surprise, he accepted. There were times where she would annoy him or others around them, but he got use to it. Yet, he hardly showed any emotion. So, she tried numerous ways to have him do so, but when she did succeed, she made things even worse. In the past, the two used to watch a lot of silly TV shows, and some of them show the stereotypical allergy gag, where the character gets all bloated from something that they're allergic to. So, Ai tried it on Sabu by planting some onions in a veggie sandwich during one lunch break, and it worked, and he got all bloated. Later on, although she wasn't intending to, he became the school's biggest laughingstock. After his reaction dissipated, she thought he would move on like he usually does, but every other student didn't move on, not even her. They just kept picking on him, reminding him about the incident, making it difficult for him to move on. Then, one day, he finally snapped. During lunch one day, he was about to sit with the group like he had done in the past, but she picked on him. Suddenly, he grabbed his milk carton and threw it at her. They were all caught by surprise, no one knew how to react to what he just done. When she looked up to ask why he did that, her question flew out of her mind and left her with a sense of dread, when she saw a slight grin on his face. It was clear that he had no remorse for what he done. And with that, he left them. Since then, he became more outgoing, but it wasn't how she envisioned it. He was rude to nearly everyone that encountered him, and she would always get the worst blows. Then, all of a sudden, things got even worse. Some kids confronted Sabu during lunch one day, and scolded him about the incident. It led to a long argument that caught everyone's attention, even Ai's. One of the kids was about to get physical, but he grabbed a nearby bat and smashed it over his head, knocking him out. Seconds later, everyone ran away out of fear, but not Ai. She just stood there, refusing to budge. Even the Yard Duty staff had trouble making her budge. Since then, Sabu went back to his old introverted behavior, but now, he would leave others with a sense of fear whenever he made his presence known. Before she even knew it, the students' fear of Sabu turned into anger towards Ai. They all blamed her for causing this, and she even lost all of the friends that she made in elementary school. Eventually, Sabu had to get transferred because of the madness that Ai indirectly caused. He seemed willing to leave, but she didn't want him to leave. Despite what she did to him, he was her only remaining friend. She didn't want to be alone. One evening, she confronted him at the school during its closing hours, and begged him to change his mind. She even begged that she wouldn't prank him ever again, but he shoved her to the ground, silencing her. He then told her "I wish you never came into my life", and with that, he left. And that was the last time they spoke as friends.

Upon entering Nijigasaki, he became friends with fellow schoolmate Goro Komatsuki. He then met Goro's uncle, who was an NPA instructor that pulled Sabu into the academy, where he personally trained him. That's where he heard about the NPA taking a liking to Goro, and he recommended to Goro's uncle that the NPA should recruit him. After the death of his mentor (See Case File #141) , he began doing freelance work. Somehow, he managed to get his hands on the TMPD case that led to Case File #113. Shortly after the case was done, Saku joined the Guardians.