It is known from one of his phone calls in his route that he graduated college early, but his major and schooling remains a secret. Seven refused at first, but after a lot of convincing from V, he left Saeran behind, entrusting Saeran's safety to V and Rika. When Seven was 15, V told Seven to take on a new name and work at an intellectual hacking company, but that he was not allowed to take Saeran with him. He met Rika at a church, and later on, V. Seven studied how to hack using a book he found on computing, promising Saeran that they would run away together. Seven took it upon himself to change their future. Saeran's punishments included being tied by the legs to the kitchen so he couldn't leave, being beaten, and being starved and dehydrated for days. Their mother abused Saeran because he was weaker than Seven and got sick more often. His father is the current prime minister and a candidate in the current presidential election their father knew he wouldn't do well in the election if the information that Seven and Saeran were born out of wedlock (by a woman who isn't his wife) was leaked, so their mother decided to hide Seven and his brother in exchange for money. Seven grew up with his younger brother, Saeran, until he was 15 years old, in a toxic household. He has dressed up as Rika, a maid, an astronaut, a fairy, and a nun in the past. He crossdresses and cosplays often as the player will be able to obtain pictures of himself in various costumes throughout the game. His attire for the party consists of a white vest decorated with red accents over a black dress shirt and a red tie. His orange headphones are seen around his neck the majority of the time. He is always seen wearing his glasses, which are yellow with dark grey (sometimes depicted as black) stripes. He usually wears a black jacket with amber accents.

Seven has messy vermilion hair and golden eyes. It is also mentioned that he is Catholic and later in his route he shows his religious values. After his route, he returns to his previous self, just toned down a little bit. Though he rejects the player at first, it is evident that he values them quite a lot and very readily displays affection when convinced that the player will accept him regardless of how he is. This fear is brought up very often during the events of his route, usually when he is trying to push the player away. This is due to his past and his profession, as he thinks that he will endanger anyone he gets close to. Outside the chat room, and behind the humorous front he puts up, Seven is actually quite depressed and serious, and he refuses to believe that anything good can happen to him. However, the player's first impression of Seven is not the 'real' Seven. He's essentially your typical jokester who loves cars (he owns multiple) and holds a passion for hacking. He frequently plays pranks on Yoosung via chat room, makes fun of the other members (and himself), and, in response to just about anything, will respond with a series of 'lol's. For the most part, Seven displays a happy-go-lucky, outgoing, and very bizarre personality.

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