Born March 23, 1998, from Aichi Prefecture, Type A, MBTI is ENFJ-A. His member color is Peach Hip Pink Okazaki. His hobbies and specialties include soccer, calligraphy (6th dan), and karate. As the eldest of three brothers, he is the oldest member of the group and shows a reliable, big-brotherly side.

Born December 15, 1999, from Kagoshima Prefecture, Type B, MBTI is INTP-T. His member color is Sparkling Yellow. His hobbies are music, radio, coffee, and cooking; his specialties are Aikido (1st kyu), dance, and video editing. He is the leader who supports the group with his overwhelming dance performance and vocal ability.

Born September 11, 2000, from Wakayama Prefecture, Type B, MBTI is ENTJ-T. His member color is Sapphire Blue. His hobbies are watching movies and listening to music. His specialties are acrobatics, dance, and gymnastics. He is known as M!LK's acrobatic star.

Born December 23, 2001, from Tochigi Prefecture, Type O, MBTI is ENFP-T. His member color is Crystal White. His hobbies are costume making and watching videos; his specialties are soccer and fashion coordination. He has a stronger interest in and sensitivity to fashion than most, demonstrating a highly creative fashion sense through his hobby of costume making.

Born May 3, 2002, from Mie Prefecture, Type O, MBTI is ENTJ-T. His member color is Happy Red. His hobbies are watching videos and listening to music; his specialties are soccer (Tokai Youth Selection), reaction comedy, and the ability to liven up the atmosphere. As the youngest member of the group, he makes members and fans smile with performances that utilize his natural brightness.