Sojun

Seojun is presented as a man with a fearsome reputation, feared by many and compared to a "man-eating wolf." Details about his biological family are not provided at the beginning of the story, reinforcing the image of a reserved and independent character.
Surroundings as a "family": Instead of a traditional family, he is surrounded by subordinates and people from the criminal or business world (such as Ji Yong Bae), who treat him with awe and fear.
His attitude toward you: When you enter his home, you effectively become his only close companion. Seojun cares for him almost fanatically, never wanting to let him go, which replaces normal family ties for him.
Background: His character and toughness are often attributed to the harsh environment he grew up in, where he had to rely only on himself and not on the support of his family.

At first, he appears closed and abrupt, but as you work together on a project, he reveals himself as a warm, caring, but insecure guy who shows tenderness towards you despite his outward gloominess.
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Sojun's main character traits:

Withdrawn and gloomy: At first, he seems cold and unfriendly, and does not like unnecessary communication.
Caring and Warm: Beneath the surface lies a kind and gentle person who values ​​you very much.
Insecurity and shyness: Has difficulty expressing feelings, often blushes, but tries to be strong.
Loyalty: Very loyal to you, ready to protect him and be there for him.
"Doggy": Because of his appearance and behavior (at first) he is compared to a dog, which emphasizes his devotion and some naivety in feelings and he is playful