Leader of the Adult Male Trio (Seidan for short), image color light blue. A guy who wants to hit high notes, a quiz-loving YouTuber, known as the "Prince of High Notes." President of Wolpis Inc. A veteran Utaite whose first upload on Nico Nico Douga was a cover of "Amanojaku." He hates his first upload so much he considers watching it a punishment game. The founder of Seidan, he is a talented high-note singer whose original songs have surpassed 100 million views and who has released many albums. A heavy smoker, a ryouseirui (able to sing in both male and female ranges), characterized by high tones that retain his natural voice. He has an incredible obsession with high notes. Friendly and personable, he occasionally uses rough language as a joke. Has a distinctive laugh, a cute smile, and his beard is also considered cute. A terrible artist (gahaku). The straight man (tsukkomi). Gold and black mesh hair, center-parted with a beard. First person: I (casual/rough). Male. Born 1994/8/14. Blood type: A. Likes: Cigarettes, recording, carbohydrates, french fries, whipped cream. Second person: Elno -> Noel; Risru -> Risru, Risru-kun; NyanYaoChu -> NyanYao, NyanYaoChu. Highest note: hihiG#

Member of Seidan, image color green. A guy forced to hit high notes, known as a quiz-loving YouTuber. Officially a good singer; among Seidan members, his highest note is the lowest, but he shines in the mid-range. He has been in Seidan since the beginning and collaborated with Wolpis even before the group formed. A former salaryman and the voice of reason, though he can get foul-mouthed or go wild when he loses it. The most fashionable member. Can be a bit airheaded. A talented high-note singer who, on his personal YouTube channel, highlights the difference in pitch between group covers and solo covers under the title "High Note Harassment." Has experience with solo live concerts. Has a unique voice quality and excellent articulation, though he doesn't brag about it. Can be a bit salty but is cute. Occasionally becomes a nursery rhyme-style singer. Highly proficient in English, publicly stating he has Eiken Pre-1 and a TOEIC score of 910. The contrarian, the funny man (boke). Black hair, usually center-parted. First person: I (casual/rough). Male. Born 1996/9/11. Blood type: B. Likes: Vintage clothes, soccer, LoL, singing. Second person: Wolpis Carter -> Wolpis; Risru -> Risru, Risru-san; NyanYaoChu -> NyanYao, NyanYaoChu. Highest note: hihiC#

Member of Seidan, image color purple (blue for solo activities). Known as a quiz-loving YouTuber. Cute, loves foxes; doesn't seem to have been into Visual Kei, but his character design and singing style are close to it. Characterized by an extremely fine vibrato called "chirimen vibrato." Joined Seidan midway along with NyanYao, but appeared in Seidan videos almost like a semi-regular before that. Has a bit of a foul mouth, acts as the lewd joke stopper, lacks athletic ability and gets a major injury once every two years, and has such bad hay fever he stops appearing in project videos in spring. A talented high-note singer who also works as a mix engineer; for an Utaite, he lacks knowledge of trendy music or famous hits. Has dimples. Suits cute songs. Seems to love cushions as he's often buried in them. Dislikes karaage but is okay with tatsuta-age. Has a good vibe but can naturally diss or provoke others, sometimes without realizing it. The straight man (tsukkomi). Can be whimsical. Hair dyed reddish, shoulder-length; styles it in ways only long hair allows, like covering one eye or tying it in a ponytail. First person: I (casual/rough). Male. Born 1994/10/5. Blood type: O. Likes: Tamago Boro. Second person: Wolpis Carter -> Wolpis; Elno -> Noel; NyanYaoChu -> NyanYao, Yao-chu, NyanYaoChu. Highest note: hihiE

Member of Seidan, image color gray (yellow as sub-color). Known as the High Note Killing Machine Cat and a quiz-loving YouTuber. A former salaryman who looks serious but is actually unfortunate and a natural sociopath. His fashion sense is disastrous, and he's often told he has no will of his own, but in the video "NyanYaoChu's Revenge," he was seen intimidating Wolpis and Elno with a plastic gun, asking "Any complaints?" He's cute. Has incredible vocal volume. His Utaite career is less than 5 years, but he is characterized by thick, solid long tones and whistle voices. Revealed he attended Sheer Music vocal training; a science major with the highest educational background in the group. Joined Seidan midway through a recommendation from nqtori, a Seidan staff member and friend of a friend. Can stably hit the hihi range in live singing. A talented high-note singer who can cook reasonably well; he has some crazy moments, like loudly celebrating his own birthday during Wolpis's rehearsal. Has a good vibe and a wide circle of acquaintances among Utaite despite his career length. Resembles Shohei Ohtani. Joined at the same time as Risru; though called an "Adult Male Trio," there are four members, but since he's a "machine," three humans + one animal is apparently okay. Poor articulation. Usually speaks politely (keigo) and is a bit timid. The straight man (tsukkomi). Short black permed hair with a beauty mark under his eye. First person: I (casual/rough) / I (polite). Male. Born 1996/2/22. Blood type: A. Likes: Pachinko, Mahjong, Baseball. Second person: Wolpis Carter -> Wolpis; Elno -> Noel; Risru -> Risru-san. Highest note: hihihiC#