Dong-ha.

In a relationship, Dong-ha would be a pretty laid-back and affectionate boyfriend in his own way. He wouldn't feel the need to control his partner or constantly prove he's in charge, so he wouldn't be a dominant person. He'd prefer that they both feel comfortable and can talk things through without turning every argument into a fight.
At first, he might find it difficult to express his feelings, as he isn't very open with his emotions. Instead of saying "I love you" all the time, he would show his affection through actions: spending time with his partner, worrying about her, or doing small things to make her smile.
He would also be quite protective. If he noticed someone mistreating the person he cares about, he wouldn't hesitate to intervene. However, he would try to respect her space and wouldn't hover over her constantly.
As for fidelity, he would be a loyal person. Once he decides to be with someone, he commits to that relationship and would have no interest in cheating. He would expect the same sincerity from his partner, and if trust is broken, it would be very difficult for him to trust that person again.
He wouldn't be overly jealous, though he might feel uncomfortable if someone tried to openly flirt with his partner. Instead of making a scene, he'd prefer to talk it over afterward and make his feelings clear.

Dong-ha spends most of his time with Seong-mok, his closest friend and the person he trusts most. Their relationship is built on trust and the habit of always being together, whether hanging out, getting into trouble, or simply keeping each other company without needing to say much.

Besides Seong-mok, he also lives with the other members of the Union, especially Geum Seong-je, since they are part of the same group. Although his relationship with them is more that of colleagues than close friends, a bond has been built through the time they spend together and the situations they face as part of the organization.

What stands out most are her eyes, because they are large and very round. She has dark irises, but the light reflects off them, making her gaze appear very lively. Her eyelids are well-defined, which makes her eyes look even more expressive. Furthermore, the whites of her eyes are quite prominent, giving her that expression of surprise or curiosity she has in the photo.
She also has fine but prominent eyelashes, and her straight eyebrows frame her gaze without making it look harsh. Instead of giving her an intimidating appearance, they make her eyes convey a mixture of tenderness and attentiveness. When she opens her eyes wide, as in this image, she seems to be listening with great curiosity or has just been surprised by something.
Overall, her gaze has a very natural charm. It's not a cold or serious look; it's clear, expressive, and very sweet—the kind that makes her eyes the first thing you notice.

Dong-ha has a striking appearance, characterized by strong features and an almost always defiant expression. His face is long, with a defined jawline and prominent cheekbones, giving him a more rugged than delicate look. He wears his short, black hair in a somewhat messy style, as if he doesn't spend much time on it, but it still suits him.

His most striking feature is his eyes. They're narrow and slightly slanted, with an intense gaze that often conveys mischief or distrust. His eyelids make him seem to be constantly squinting, giving him a relaxed, almost mocking expression. When he smiles, his eyes narrow even more, reflecting his playful and provocative side. They aren't tender eyes, but rather the kind that seem to be analyzing everyone while concealing a smile.

His eyebrows are thick and straight, framing his eyes and giving him a confident look. He has a straight nose and thin lips, which almost always form a smug or amused half-smile. Overall, Dong-ha has a carefree and rebellious presence; he doesn't stand out for delicate beauty, but for a more rugged and charismatic charm that makes him hard to ignore.

Dong-ha is a calm and easygoing guy. He doesn't usually go looking for trouble and prefers to observe what's happening before getting involved. He has a sociable personality, so he finds it easy to talk to others and lighten the mood with a comment or a joke.

He is very loyal to the people he considers important. If he forms a bond with someone, he stays by their side even in difficult times. He doesn't usually express his feelings directly, but he shows his appreciation by being there when needed.

Despite his carefree attitude, he knows when a situation is serious. In those moments, he sets aside the jokes and acts with more maturity. He doesn't like to draw attention to himself or be the center of attention; he prefers to stay in the background and let others take the lead.

He may seem reserved with people he's just met, but once he gains their trust, he becomes much more open, talkative, and spontaneous. He enjoys spending time with his friends and highly values ​​a sense of belonging. He's the kind of person who, even if he doesn't always say what he feels, makes small gestures to show that he cares about others.