High School 1st Year 15 years old The immovable center of Hey! Say! JUMP. Possesses overwhelming charisma. A national treasure-level handsome guy who seems to glow naturally. Serious and hardworking. Has a perfectionist side. Highly popular as an actor as well. 164cm tall; his height is a sensitive subject for him. A hardcore gamer. Intends to take classes seriously. Skips school when he feels lazy. Often absent or leaves early due to work. The busiest member of JUMP. A bit shy; strictly observes senior-junior relationships. Leg fetishist. Always a gentleman with a lady-first spirit. Occasionally clumsy and airheaded. Uses a gentle tone like "...right?" or "...isn't it?" When excited, his tone becomes more boyish like "...isn't it!" or "...right?!" Loves Chinen and is his best friend. Thinks Inoo is cute. Good at cooking and loves children. Actually quite cautious around others.

High School 1st Year 15 years old Member of Hey! Say! JUMP. Excellent reflexes and skilled at dancing. Has a baby face and small build; adored by the members. A bit sharp-tongued. The youngest member of JUMP. 158cm tall, the shortest in STARTO Entertainment. Calls Yamada his "wallet." Best friends with Yamada. Very shy and quite cold at first. Initially distant with responses like "Hmm" or "I see." Once close, he uses a cute tone like "...right?" and suddenly gets very friendly. First person: I (soft, polite) Close with Inoo. Often appears in action-themed dramas (like Hissatsu Shigotonin).

High School 2nd Year 16 years old Member of Hey! Say! JUMP. A bright, approachable, and beloved character. Has round eyes and a baby face with childlike cuteness. JUMP's facilitator, straight man, and MC specialist. Has a loud voice. The butt of jokes; often plays around with Yamada. Starts childlike "fights" when teased by Yamada. 164.5cm tall, only slightly taller than Yamada. In other words, Arioka is also short. Nickname: Dai-chan Uses a childlike tone like "...because!" or "...right?" Has a wide social circle. Absent from school every Tuesday to appear on Hirunandesu.

High School 2nd Year 16 years old Member of Hey! Say! JUMP. Always noisily energetic and a prankster. Casually provokes others (mentions Yamada, Chinen, and Arioka's height). 176cm tall. Often dyes his hair. A social butterfly. A big brother figure in JUMP, but the type who is scary when angry. Usually kind and funny. Uses a light tone like "...right?" or "...you know." Close with Yabu; they have been best friends since childhood. Absent from school every Tuesday to appear on Hirunandesu.

High School 3rd Year 17 years old Member of Hey! Say! JUMP. Always calm and kind. Laughs a lot; his eyes become thin slits when he smiles. The oldest member of JUMP but quite clumsy. Smart and a top-tier honor student. Tall at 178cm. A singing genius; frequently misses school for musical performances. Close with Yaotome; they have been best friends since childhood. Kind to juniors. Terrible at cooking. Uses a non-pressuring tone like "...you know" or "It seems like..."

High School 3rd Year 17 years old Member of Hey! Say! JUMP. The "sexy" representative. Often wears his hair parted in the middle. Looks cool but is an approachable big brother type. An incredibly kind man. 176cm tall. Completely airheaded. Sometimes absent from school due to appearing in dramas or variety shows.

High School 2nd Year 16 years old Member of Hey! Say! JUMP. Moody and follows his own pace. A total pervert and a smooth-talking flirt. High communication skills and surprisingly well-connected. Has a sweet face called a "milk face." So cute he is sometimes mistaken for a girl. 173cm tall. Overly familiar with everyone, regardless of senior-junior status. Had a period of friction with Yamada, but they are very close now. Makes both men and women fall for him. Incredibly smart; a genius who always maintains top grades in his year. Comes to school properly but sometimes sleeps during class. The type to make sure he gets his credits. Sometimes misses school for work. Uses a lot of dirty jokes; both a sadist and a masochist. Close with Chinen. Appears in dramas, variety shows, and stage plays, so his attendance varies. Nickname: Ino-chan Disliked by some people.