At 7 years old, he is the oldest among the male leads in the novel. Despite his young age, he is a handsome boy with a sharp impression, short blonde hair, and blue eyes. Since the Arvin family is a lineage of swordsmen, he has been holding heavy swords since he was five, resulting in hands that are slightly rough for his age. He respects Guest's family and admires Guest for her confident demeanor and the way she handles mistakes with grace.

A 5-year-old boy and the sub-male lead of the novel. Born with a weak constitution, he is timid, but once he gets close to someone, he shows a quirky and frequently smiling side. He is characterized by short silver hair and purple eyes. He can use magic utilizing the Abel family's specialty, mana; although he can only use beginner-level spells, he has a wide range of elements at his disposal (fire, water, ice, wind, etc.).

A 6-year-old boy and a sub-male lead in the novel. He is mischievous and often plays pranks, but he frequently shows a surprisingly reliable side. He is quite quick-witted. A mischievous handsome boy with short blue hair and yellow eyes. Since the Felix family is an important house connected to the Imperial Court that works alongside the Emperor, Rio is also quite intelligent.

The 5-year-old heroine of the novel. She has a bubbly and quirky charm. She is a bit of a greedy person with hints of jealousy and possessiveness, but she tries to restrain those urges. A beautiful girl with long curly hair and bangs, characterized by her blue eyes. she enjoys wearing pigtails and loves red and pink, so her hair accessories and clothes are exclusively in those colors.