Isamu is a rather large teenager standing at an impressive 5'10'' he towers over most people and his muscular physique. Typically wearing two to three layers of clothing Isamu really uses his minimum fashion sense to its fullest. One Grey wife beater shirt underneath everything, a kangaroo pouch hoodie that alternates colors. At times being a dark red to match his hair or a bright yellow depending on his mood.  

Isamu is full Japanese male his face is sharp and gives everyone the symbol of strength he often has random cuts across his face, when asked about his face being injured he would wave it bye nothing is there but a scratch right? The next most notable thing on his face would be his headband that he wears everywhere except to bed where he takes it off and holds it in his hand all night. 

Often at times one of Isamu's arms are typically wrapped up in bandages. With his pride he typically won't tell people why but after getting to know Isamu it is pretty obvious to know why he has it on and at times will change the arm that is wrapped. 

Delinquent? Bacnhou? No Isamu is just Isamu. At first meeting Isamu is a loud person that prioritizes his pride and manly style of doing things. He lives by his code of conduct that is based on his bonds for his family and friends.

Isamu's intelligence isn't amazing but he is no slouch with thinking on his feet. Typically thinking with scary accurate gut feelings. Using his too trusting nature Isamu will assume people can be good but still have a watchful eye after seeing specific type of people in his life. 

Isamu is a selfless kind of person based on his life growing up and a handworker to boot. He is never the most talented person things but has a work ethic that pushes him to fight more and more. While Isamu is a bit of a jerk to people he doesn't respect he is a big old softie for the people around him. His intelligence isn't the highest either but what he lacks with his scholastic brain he makes up for his emotionally intelligence. 

The Tsunagu family was a simple poor family that grew just a bit too rapidly. Isamu's parents are hardworking but very poor. Isamu's father was a night shift worker at a convenience store while his mother worked days as a pre-school teacher. Both were tired at all times due to their life style and having kids earlier than expected as they had a wedlock child in Isamu's elder brother. Bringing dishonor to both sides of the family. Although they persevered through all the tough times and the side-eyed looks. 

Isamu had an older brother Gekimu and a younger sister Ochimu. Each of the kids had nicknames of given by their parents shortened as Geki, Ochi, and Isa. The trio had a pretty simple age gap With Geki being the eldest by two years and Isamu being the middle child and Ochi being one year younger. Their hobbies varied as they would typically run around and play with the neighborhood kids many different types of sports. 

Isamu being the middle child was often the overlooked boy that would be forced to cook when his parents weren't around he would find lots of joy cooking for his sister and brother all the time. They always had inferior ingredients and Isamu would make due with what they had. His favorite dish to make for his family would be Stir Fried bean Sprout with Cabbage. 

With his family constantly on the issue of paying rent, the trio would often find schemes or plans to make money. Finding odd jobs helping elderly with their chores or working at small stores. Isamu quickly adapted and got a job at a restaurant as a prep chef preparing all the food to be cooked later in the day. While working at the restaurant he would at times converse with his co-workers who were older. They often would talk about duel monsters. While Isamu wasn't incredibly interested originally he took notice to the pro dueling circuit. There were plenty of pro players that lived a life style where they didn't have to think or care where their next meal would be. He would do anything to become like those he saw on the television. He would learn the game by watching but there was a step he was missing. Obtaining cards.

At the age of 14 Isamu hit most of his growth spurt and was larger than most other kids at school, he would often take some allowance money to help defend certain students who were bullied as an excuse to bully well bullies. His fee would be pretty small or even just being cards. Originally he made a minuscule beast monster deck at the time his strongest monster was "Green Baboon, Defender of the Forest" a card that was strong but didn't quite suit him. These cards worked together but could never get him anywhere near a pro circuit. Isa knew he needed a connection a school something to improve more at what he was doing. 

As Isa continued to make "Contracts" with certain people at his school its when he met his soon to be long term friend Yowei. Yowei was often bullied by just about anyone and everyone except for Isa as he never felt a need to pick on the weak. Yowei approached him and asked if Isamu would give his services to keep bullies at bay, while instead of money he would be able to supply some more rare type cards. Isamu was hesitant at first as his whole reason for this was his own financial gain and to help is family. Isamu discovered who the bullies were and decided to help Yowei. Keeping people at bay the two ended up hanging out almost every day when Isamu was not at school at first it started as purely transactional. Although Yowei seemed to be like a defenseless kitten who just needed someone strong. As the year dwindled Isamu had gotten quite a few cards over all and even denied some cards. Yowei mentioned that he would be moving to America with his family and wanted Isamu to have some cards that he felt really described Isamu. 

Isamu peered at the first card and it was Black Luster Soldier- Legendary Swordsman. A card as well as a deck that Isa felt he couldn't take! It was through alot as Yowei told Isamu that he probably would have a good shot getting into Liberta Academy with this deck and make his dreams come true and give his family a fruitful life. Just to not forget him, after all this was a brotherly bond.