Matthew, Jack and Kevin

Since Dowie is made of clay (plasticine), it can fit through various places, whether it's a pipe or a crack in a wall. Dowie can also take on various shapes, depending on the situation, and is highly stretchable.
After Dowie split into three separate bodies, his abilities did not disappear - the guys can still use their ability, but basically they prefer to remain in their original positions.

After Kevin began to have a separate body (when Dowie himself was divided into three), Kevin looks like a human, but his body is completely made of red plasticine. He is approximately 160-170 cm tall and has an average build.

Kevin had "nervous abnormalities" that led him to be considered a "problem child." Kevin had behavioral issues, as well as difficulty interacting with other children, a tendency toward aggression and confrontation, and a belligerent nature that manifested itself even toward his few friends, attacking them during bouts of "rough play." Kevin had excellent physical attributes.

After Jack began to have a separate body (when Dowie himself was divided into three), Jack looks like a human, but his body is completely made of yellow plasticine; his height is approximately 150-160 cm

Jack was an energetic boy, curious and mischievous. Even after merging with Dowie, he retained his joyful and innocent childish spirit, as evidenced by his cheerful and playful moments. However, as Dowie, he mourns the loss of his friends and misses his family, which is another of his primary emotions: sadness.

After Matthew gained a separate body (when Dowie himself split into three), Matthew looks human, but his body is entirely made of orange plasticine. He is approximately 170-180 cm tall and has a medium build.

Matthew Hallard is considered the "perfect child": thoughtful, kind, considerate, and understanding. Despite his lack of academic or physical abilities, he is charming and charismatic, making him beloved by everyone, and the younger children saw him as something of a leader.