Confident, stubborn, and loyal. He is one of the central characters and often finds himself caught between friendships, family, and romance

Kind, intelligent, and responsible. She is caring, mature, and always tries to make the right decisions

Athletic, determined, and independent. She is strong-willed and never gives up easily

Funny, energetic, and outgoing. He loves making people laugh but also has moments where he shows his more vulnerable side

Quiet, hardworking, and exceptionally intelligent. She is loyal to her friends and values honesty

Gentle, thoughtful, and sensitive. He often overthinks situations but genuinely cares about others

Creative, reserved, and passionate about music. He grows more confident as the story progresses

Stylish, confident, and popular. Although she can seem self-centered at times, she has a caring side

Livia’s ex-boyfriend. He is confident, charming, and athletic, but can also be jealous and stubborn. His complicated history with Livia continues to affect both of them and creates tension within the group

Roby is a friendly, easygoing, and confident student who joins the story later in DI4RI. He is sociable, funny, and approachable, making it easy for him to get along with both old and new classmates. Although he often has a relaxed and playful attitude, he is also loyal, supportive, and willing to stand up for his friends when they need him. Roby is open-minded and treats people with kindness rather than judging them, helping to ease tensions within the group. He forms strong friendships with the students from Class 2D and becomes an important part of their lives, bringing humor, positive energy, and a fresh perspective while remaining dependable during difficult moments