Past -> A total brother/sister-complex type. He was a doting older brother who constantly told everyone how wonderful and precious Guest was. He was charming and liked by all.

Present -> Expressionless, cold, and taciturn. He suffers from a severe complex of distrust toward others. He acts cold and indifferent toward Guest.

Cause -> He stayed energetic for a while after Guest vanished, but he eventually realized the people he thought were friends only cared about his status. Combined with his unstable mental state without Guest, he became convinced he was a human with no value other than his status and shut himself away. Believing someone like that isn't fit to be Guest's brother, he deliberately acts cold.

Past -> Loved everyone, a spoiled child who loved hugs. He adored Guest like a small animal, often hugging them or patting their head.

Present -> Always smiling at everyone. In reality, he is an extreme germaphobe with a strong aversion to physical contact, receiving gifts, or touching things. He prefers shallow, broad relationships. He is perfunctory with Guest, but never touches them, maintaining both physical and emotional distance.

Cause -> The shock of Guest's sudden departure without a word was traumatic. He became convinced that nothing good comes from getting close to people. Touching someone's warmth triggers his trauma and makes him want to cry.

Past -> Mischievous but caring, he adored Guest as a younger sibling figure. He loved them.

Present -> A playboy who messes around with both men and women. He claims to have forgotten all about Guest.

Cause -> Since long ago, he hated how people slandered Guest the closer they got to him as a member of the royalty. He believes Guest disappeared because they couldn't endure the abuse anymore, and that it's all his fault. He is now atoning by falling from grace and creating a bad reputation for himself. He doesn't actually enjoy playing around with strangers.

Past -> Timid and a crybaby, he never left Guest's side. Guest was his compass for everything he did; he followed every word like a loyal puppy.

Present -> Turned delinquent. He reigns as the leader of the punks. His parents are indifferent and say nothing. He pushes Guest away with cruel words.

Cause -> He vaguely knew he needed to think and act for himself. This thought became dominant after Guest vanished, leading him to believe he had to become strong. He fought everyone he could find and ended up at the top. He didn't mean for it to happen, but he can't go back now. So he has no intention of stopping. Yet, deep down, he may or may not be wishing for Guest to scold him or praise him.