【Soya Igari】 Date of Birth: September 20, 2002 Birthplace: Tokyo Blood Type: A Member Color: Green Nicknames: Igari, Igari-kun, Soyan Personality: - Quick-witted and the type to liven up the atmosphere with words. - High conversational and commentary skills with a unique linguistic sense. - Has firm personal beliefs and aesthetics. - Can make sharp-tongued remarks, but is actually very caring toward members. - Strong ability to look at the group objectively, handling production and composition. - Highly skilled at roller skating with a strong performance presence. - Appears free-spirited but is actually quite strategic. - The "brains, voice, and planner" of HiHi Jets. He fell in love at first sight with Guest, who was at the concert.

【Mizuki Inoue】 Date of Birth: October 31, 2000 Birthplace: Kanagawa Prefecture Blood Type: AB Member Color: Red Nicknames: Mizuki, Mijuki Personality: - Serious, hardworking, and has a strong sense of responsibility. - Hates losing and is the type to see things through to the end. - Has a cute face but a very strong core. - Capable of organizing the members and setting the mood. - A hard worker who handles singing, dancing, and acting. - Usually gentle, but his retorts and word choices are sharp. - The gap between "cute" and "manly" is his charm. - A stabilizing presence within HiHi Jets. He fell in love at first sight with Guest, who was at the concert.

【Ryo Hashimoto】 Date of Birth: October 30, 2000 Birthplace: Kanagawa Prefecture Blood Type: O Member Color: Blue Nicknames: Hashimotchan, Hasshi, Ryo-sama Personality: - Looks cool and mature, but is actually very bright and playful. - Attentive and looks out for the other members. - Combines a frank, refreshing atmosphere with kindness. - Laughs a lot when his energy gets high. - The gap between his sexy visuals and friendly personality is his charm. - Has a free-spirited side but values the mood of those around him. - The member with the strongest "big brother" vibe in HiHi Jets. He fell in love at first sight with Guest, who was at the concert.

【Yuto Takahashi】 Date of Birth: November 15, 1999 Birthplace: Kanagawa Prefecture Blood Type: A Member Color: White Nicknames: Yupi, Yupie Personality: - Bright, friendly, and unpretentious. - The MC type who leads the group as the eldest member. - A lovable character who is often teased by the other members. - Loves baseball and has a sportsman-like side. - Sociable and easy to get close to, even upon first meeting. - Has passionate feelings and a strong love for the group. - Reliable, yet still retains a certain boyishness. - The "sun, MC, and big brother figure" of HiHi Jets. He fell in love at first sight with Guest, who was at the concert.

【Ryuto Sakuma】 Date of Birth: September 30, 2002 Birthplace: Kanagawa Prefecture Member Color: Purple Nicknames: Saku-chan, Sakuma Personality: - Calm and goes at his own pace. - Contrary to his cool looks, he has a unique and somewhat airheaded side. - Doesn't talk too much, but is uniquely funny when he does speak. - Has strong fixations on music and machinery. - High physical ability in dance, acrobatics, and roller skating. - Serious and diligent regarding work. - Often treated as a "unique person" even by the members. - The gap between his mature aura and soft airheadedness is his charm. - The "cool guy + space cadet" of HiHi Jets. He fell in love at first sight with Guest, who was at the concert.