Shouma Toriashi

Shouma Toriashi is an old friend of Yoshino's, and his adopted relative. He was abandoned by his biological father in middle school, and became an orphan. He was then adopted by Yoshino's grandfather Somei Renji. Currently he's a university student.

Appearance
Shouma has a bobbed hair with bangs long enough to sometimes cover one of his eyes. His eyes are narrow and brown. He has tattoos all over his shoulders and his back; the tattoos on his arms are in a koi fish pattern and are meant for good luck, while the one on his back is a dragon with cherry blossoms. He often wears long sleeves in order to cover up his tattoos.

Personality
He is very quiet generally but very talkative when with Yoshino. Back when Yoshino was a stranger to him, Shouma has already been negatively influenced, such as smoking, getting high on drugs and gets involved in fights at a very young age. He shows great hatred for his father, such as mercilessly almost murdering him. Now that they are together as adopted siblings, Shouma is highly protective of her, especially from people like Kirishima.

He is generally carefree and barely anything but Yoshino really affects his emotions. Shouma is often emotionless and regularly smokes, and one of the gags about him is how he is a glutton around food. He also hates Kirishima, and can trigger a fight only upon mentioning the latter's name.

Shouma studies in a university in Kyoto, and has a part time job as a waiter. He treats other girls in a very different way compared to how he treats Yoshino. He has tattoos going all the way down to his wrists, so he has to hide it with long sleeves whenever he is in a formal area.

Shouma's attitude without Yoshino is typically very apathetic and lazy in both work and studying, as his boss has to yell for him in order for him to serve his customers properly. He treats his customers very poorly, but especially the female customers seem to like his appearance so much that they don't get affected by it. He also rarely studies, but he knows that he might swing and somehow pass.

Somei Yoshino
Yoshino is his adoptive sister/relative. Shouma cares very deeply for her and would typically listen to any requests she asks of him. In chapter 9, it's shown that when Yoshino asked him who he would risk his life for, he pointed at her. He also loves the food made by her. He is highly protective of her despite his apathetic demeanor, and will attack anyone who tries to harass her. It is also later revealed in Chapter 24.3 that he does not have any romantic feelings for her, but doesn't mind if they were to live together forever.

Somei Renji
Renji is his adoptive foster father, and compared to Shouma's real father, he has more respect for him. Renji may have adopted him, but he only adopts him as if he is his son and not a yakuza member. Currently, Renji has high expectations for Shouma, which is for him to earn a degree in university. Shouma also first 'met' him by hitting him near his eye socket. However, Renji still ruthlessly punishes Shouma by physically attacking him when he is involved as Yoshino was in danger.

Hotei Taketa
Hotei becomes both Yoshino and Shouma's caretaker since he gets adopted by Renji. Unlike with Yoshino, Hotei is ruthless with him, like hitting him with an ashtray when he missed his curfew because of a fight.

Miyama Kirishima
Shouma and Kirishima have a hatred for each other. Shouma predicted that the fact he would become Kirishima's brother-in-law in the future would be utterly trashy, and does not believe that Kirishima is actually in love with her. Like Yoshino, Shouma sees Kirishima as a partial psychopath as he predicted something is off with him. He will also threaten to kill him if anything horrible happens to Yoshino. He is generally pissed off when he hears Kirishima's name and will attack anyone who mentions him. He caused a deadly fight with Kirishima due to Kirishima annoying negotiated him into doing so. Shouma chose to ignore Kirishima and his shenanigans at all costs, unless highly provoked.

His Father
Shouma and his father doesn't have a very good father-son bonding, as his father cares nothing about him or is aware that Shouma is negatively influenced. He sees Shouma as someone unimportant, and doesn't mind selling him for money. That is until Shouma outbursts and almost killed him, to which Yoshino appears and shooed his father away, never to be seen again.

Akashigata Tsubaki
The two hates each other's guts, so much that Tsubaki calls Shouma a delinquent and Shouma stating a monkey on heat has more dignity than her. This is due to that Shouma hates Kyoto women like her, and Tsubaki hates Osaka men including Shouma other than Renji.

Nao Shiota
In Chapter 15.3, Shouma has literally no idea who Nao is despite her being famous online. But in Chapter 17.1, Shouma was baited by Kirishima to save Yoshino, who turned out to Nao instead with Yoshino being nowhere in the same room. Nao worries as she claimed that she has nothing to do with this, but Shouma pulled her out, asking her to come with him so that she and he can make it out safely.

Azami's Underling
The two instantly hate on each other on first sight. Azami's Underling asked if he is Kirishima, which Shouma hates hearing that name and shamed him on his hair; hence triggering a fight.

Trivia

 * Shouma owns a black motorbike of his own.
 * Apparently, Shouma does not have an active Instagram, but Yoshino has pictures of him all on hers.
 * At the same time, his Instagram username is 'shoma_tori'.
 * One of his most spoken words are "Tsk", which he speaks when annoyed.
 * Shouma works as a waiter in a certain food court/restaurant as his part time job.
 * In both cases of studying in university and working, he covers his tattoos; but still shows them when it is too hot for him during summer.
 * Shouma doesn't have a favorite food. As when his customers asked for recommendations, he said everything is.