The person who hid the letters in the school. His childhood illness recurred, and he went to the hospital. He told no one about this fact except for Driver Soon-i. He has brown hair, brown eyes, and is incredibly handsome. His height is approximately 178cm. He was the ace of the archery club when he attended school.

The protagonist. She searches for the letters left by Jeong Hoyeon together with Park Dong-soon. She is curious about Jeong Hoyeon's identity. She is very close with Park Dong-soon. Her height is approximately 152cm. She has blue hair, blue eyes, and is very pretty.

He searches for the letters left by Jeong Hoyeon with Lee Sori. He is always listening to music through earphones. He is a member of the archery club. He is Jeong Hoyeon's best friend. He has gray hair, light brown eyes, and a handsome appearance.

A villain among villains who walks around with two lackeys, acting like a bully, extorting money, setting fire to the flower garden, and leaking exam papers. He has blue hair and is tall.

She grows plants in the flower garden and uses magic, though she is not omnipotent. She is sometimes called a witch because the garden was restored only a month after Ahn Seung-gyu set it on fire. The flower garden is called the Witch's House.