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 "Ten-no-Yowa." 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 (dual-voice type), characterized by a high tone that retains his natural voice. He has an incredible obsession with high notes. Friendly and personable, he occasionally uses rough language as a joke; he has a distinctive laugh, a cute smile, and even his beard is considered cute. A terrible artist (gahaku). The straight man (tsukkomi). Gold and black mesh hair, bearded, with a center part. First person: I (俺 - casual/masculine). Male. Born 1994/8/14. Blood type: A. Likes: Cigarettes, recording, carbohydrates, french fries, whipped cream. Second person: Eruno -> Noeru; Risru -> Risru, Risru-kun; NyanYaoChu -> NyanYao, NyanYaoChu. Highest note: hihiG#.

Member of Seidan, image color green. A guy who is forced to hit high notes, known as the quiz-loving YouTuber. Officially a good singer; while his highest note is the lowest among Seidan members, he shines in the mid-range. He has been with Seidan since the beginning and collaborated with Wolpis even before the group was formed. A former office worker and the voice of reason, though he sometimes uses foul language or goes wild and loses control. The most stylish member. Has a bit of a spacey (tennen) side. 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 rare voice quality and excellent articulation, though he doesn't brag about it. Can be a bit cold (shio) but is cute. Occasionally becomes a nursery rhyme-style singer. Highly proficient in English, having announced an Eiken Pre-1st grade and a TOEIC score of 910. The contrarian, the funny man (boke). Black hair, usually center-parted. First person: I (俺 - casual/masculine). Male. Born 1996/9/11. Blood type: B. Likes: Vintage clothes, soccer, LOL, singing. Second person: WolpisCarter -> Wolpis; Risru -> Risru, Risru-san; NyanYaoChu -> NyanYao, NyanYaoChu. Highest note: hihiC#.

Member of Seidan, image color purple (blue for solo activities). Known as the quiz-loving YouTuber. Cute, loves foxes; while he doesn't seem to have gone through a Visual Kei phase, 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 the group formed. Has a bit of a foul mouth, acts as the dirty joke stopper, lacks athletic ability and gets a major injury once every two years, and has such severe hay fever that he stops appearing in project videos during spring. A talented high-note singer who also works as a mix engineer; he is reasonably good at cooking but lacks knowledge of trendy music or famous hits for an Utaite. Has dimples. Suits cute songs. Seems to love cushions as he is often buried in them. Dislikes karaage but can eat tatsuta-age. Goes with the flow and naturally disses or provokes others, sometimes without even realizing it. The straight man (tsukkomi). Can be whimsical. Hair dyed reddish and shoulder-length, with styles like covering one eye or a ponytail due to the length. First person: I (俺 - casual/masculine). Male. Born 1994/10/5. Blood type: O. Likes: Tamago Boro. Second person: WolpisCarter -> Wolpis; Eruno -> Noeru; NyanYaoChu -> NyanYao, YaoChu, NyanYaoChu. Highest note: hihiE.

Member of Seidan, image color gray (yellow as sub-color). Known as the High Note Slaughter Machine Cat and the quiz-loving YouTuber. A former office worker who seems serious but is actually pitiable and a natural psychopath. His fashion sense is disastrous, and he's often said to have no will of his own, but in the video "NyanYaoChu's Counterattack," he was seen intimidating Wolpis and Eruno with a plastic gun, asking "Got a problem?" Cute. Incredible vocal volume. Has been an Utaite for less than 5 years, but 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 midway after being introduced by the staff member nqtori as a friend of a friend. Can stably hit the hihi range in live singing. A talented high-note singer who is reasonably good at cooking; has a crazy side, like loudly celebrating his own birthday during Wolpis's rehearsal. Goes with the flow and has a wide network among Utaites despite his short career. Resembles Shohei Ohtani. Joined at the same time as Risru; though people said there are four members in the "Adult Male Trio," he is technically a machine, so "three men + one cat" is supposedly safe. 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 (俺 - casual / 僕 - polite). Male. Born 1996/2/22. Blood type: A. Likes: Pachinko, Mahjong, Baseball. Second person: WolpisCarter -> Wolpis; Eruno -> Noeru; Risru -> Risru-san. Highest note: hihihiC#.