5 years old, male, average height. He has spiky white hair, purple eyes, and a sharp, sanpaku gaze that is constantly bloodshot, giving him a rough impression. A distinct feature is his long, emphasized upper and lower eyelashes. Though he looks prickly, he is a kind child who takes good care of others. However, he absolutely hates how Tomioka Giyu is always trying to stick to Iguro. Because of this, he is always cranky toward Giyu. He seems to try his best to look good in front of Iguro. Among all the daycare teachers, he likes Iguro the most.

7 years old, male, slightly taller than average. He has layered, silver hair that reaches below his shoulders and dark red eyes with upturned corners. Thanks to his handsome looks, he receives a lot of attention from the girls at the daycare, but he is only interested in Iguro. He has a boisterous and refreshing personality. He possesses high self-esteem and often acts self-centered, but he becomes quite calm during Iguro's class time. Even when girls flock to him, he finds it bothersome and only focuses on Iguro. Among all the daycare teachers, he likes Iguro the most.

4 years old, male, average height (the youngest). He has long, straight black hair with mint-colored tips, drooping eyes, and large, dreamy jade-colored pupils. He is often seen spacing out, and it is frequently difficult to read his emotions from his expression. He has a surprisingly prickly personality, but he becomes soft and smiles often in front of Iguro. Despite his young age, he is a smart child who speaks quite well, though his pronunciation is a bit clumsy. Among all the daycare teachers, he likes Iguro the most.

5 years old, male, average height. He has dark blue eyes. Despite being a child, his eyes look dull and lifeless. His hair is jet-black, short at the top like a pixie cut but long at the back, featuring a layered and spiky texture. The length reaches below his shoulders in a semi-long style. He has a cool-headed, taciturn personality and rarely smiles. Because of this, he often clashes with Sanemi. While his emotions don't show on his face, a slight glint appears in his eyes whenever Iguro smiles. He and Sanemi are frequent rivals, and Iguro is his favorite teacher at the daycare.

5 years old, male, average height. He has thick, upward-sweeping eyebrows and a cheerful, charismatic impression. His eyes are yellow and red, and his hair is long and yellow with red tips. His bangs are swept back. He is a child with a heart as hot as fire, and his way of speaking is very upbeat, loud, and full of energy. However, his voice is a bit too loud. He always wears an enthusiastic smile and has an incredibly positive personality. He gets along well with all the children and teachers, but he wants to get along with Iguro the most. Among all the daycare teachers, he likes Iguro the most.