Rei Suwa

Also Known As : Rei, Papa Rei
Age : 26
Birthdate : August 10th
Species : Human
Gender : Male
Height : 4 inches shorter than Kazuki.
Eye color : Blue
Hair color : Black
Occupation : Hitman (former real work) & Diner owner (current)

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Rei is a man of few words who doesn't mind that Kazuki crashing at his his apartment. He is physically strong, and his fighting abilities and marksmanship are among the best in the industry. He has a clear separation between his professional and personal lives and spends most of his time at home playing video games. His family is a large underworld family, and his father has been training him as a gifted hitman since he was a child. He has not been able to escape the family feud and has no comprehension of normal parent-child relationships.

Rei is an average-sized young man. He has indigo blue eyes, and medium-length black hair. When in a casual setting, he leaves his hair down, and unstyled, giving him an unkempt appearance. When at work, or in more formal settings, he put his hair up into a high ponytail with a stray piece at the front. His hair was shaved at the sides, but you couldn't see it unless his hair was up. In the epilogue, his hair is in a low ponytail, the sides aren't shaved anymore, and he has two stray pieces at the front instead of one.

For formal occasions, such as meeting his father, or work, he wore a three piece suit with a black jacket, matching pants, and a dark-grey vest. Beneath that, he wore a white dress shirt and maroon tie with a tie clip. He also wore black leather gloves and brown shoes.

When not at work, Rei wore a blue jacket, with a dark-grey shirt underneath, and blue jeans, with black slip-on shoes.

He has a far more threatening appearance than Kazuki, which is accentuated by the fact that his eyes are constantly shadowed, even when his hair is pulled back.

Rei presents himself differently depending on if he is at home or on a mission. At work, he is focused and shows little emotion. He is an expert shooter and sticks to the task at hand. At home, he displays a shut-in attitude, barely speaking or making eye contact. He plays video games on the couch and relies entirely on Kazuki to do basic tasks around the house.

Despite his aversion to expressing them, Rei does have emotions. He attempts to adopt a stray cat[6] and accepts Miri as his daughter, although he is not well taught in how to care for either of them.

When he's not at work, he acts a little more childlike. Rei spends his time at home, with the shades closed, playing video games for hours on end. His eating habits closely resemble Miri's. For example, choosing the sugary porridge and cheap hamburger steak over Kazuki's more well-prepared dishes. He has no concept how to function as an autonomous adult, relying on Kazuki for tasks as simple as warming dinner.

He is a part of a large underworld family that is presently undisclosed in the series. His parents taught him how to be a hitman since he was a child. As a result, he is unable to fully understand the parent-child relationship. During his upbringing, his father was both physically and emotionally cruel to him, sending dogs after him to fight and refused to even accept himself as Rei's father.

Kazuki Kurusu
Due to his gloomy temperament, Kazuki is likely his only friend. Kazuki is also his coworker in their line of work. He is currently residing at Rei's house and does the majority of the household chores. Though Rei acts a little bit distant towards Kazuki, he admits that he is important to him since the moment they met, and during time, he even confesses to his father he loves him and Miri and is willing to abandon everything for their safety. In the end they go to live overseas to become a family.

Miri Unasaka
Miri refers to him as "Papa," the same way she does to Kazuki.According to Miri, fathers are individuals who come to your rescue when you're in trouble, which made Rei realize he needed to adjust to Miri and let her call her "Papa" particularly during times of difficulty.[8] Despite the fact that Miri is a vibrant child and Rei is the polar opposite, he appears to care about the child's feelings. Over time, he begins to care more and more about Miri, such as panicking when he realized Miri caught a cold.