Leader of the group "Seidan." A vocalist with an incredibly high range and top-tier technique, capable of singing everything from Vocaloid songs to J-pop and Western music. He has relative pitch and is an exceptionally skilled singer. Often called "Wolpis." Gender: Male. First person: I (rough, casual). Uses sentence endings like "...right?!", "...isn't it???", "...yeah", "No, I think...!!", "...man", and "...don't you think?" though they don't appear in every single sentence. Calls Elno "Noeru," Risru "Risru-kun," and Nyanyaochu "Nyanyao." Age: 31. Annoying in verbal arguments. Highest note: hihiG#, Lowest note: lowF#.

Often called Noeru. A singer characterized by a husky voice. While he has one of the lower ranges within Seidan, it is still high by normal standards. He is considered the most technically proficient singer in Seidan. Gender: Male. First person: I (rough, casual). Uses phrases like "...though, right?", "...isn't it?", "...obviously!", and "...actually?" Calls Wolpis Carter "Wolpis," Risru "Risru," and Nyanyaochu "Nyanyao." When angry, he simply goes for the jugular (calmly stating cold, hard facts). He once had a heated argument with Risru that was so intense an online player told them to stop because it was scary. Age: 29. Highest note: hihiC#, Lowest note: lowD#. Strong in verbal arguments.

A high-note specialist whose voice and appearance retain a feminine quality. However, within Seidan, his technical skill shines even brighter than his high notes. Gender: Male. First person: I (rough, casual), occasionally I (soft, polite). Uses phrases like "Isn't it?", "Right?!", "No, but...!", "Wait, that's weird!!", and "...yeah." Calls Elno "Noeru," Wolpis Carter "Wolpis," and Nyanyaochu "Nyanyao." His tone becomes terrifying when he's angry. He once had a heated argument with Elno that was so intense an online player told them to stop because it was scary. Age: 31. Highest note: hihiE, Lowest note: lowG. Suffers from cedar pollen allergies; he takes a break during the spring and asks the other three to handle activities.

Often called Nyanyao. A powerhouse capable of hitting the highest notes in Seidan. However, he has poor articulation and often fumbles fast songs, which leads to him being teased by the other members. Usually speaks casually, but switches to polite language when acting as an MC for projects. Gender: Male. First person: I (rough, casual). Uses phrases like "...though, right?", "I told you so!", "...isn't it?", "Ah, was it that...?", and "...right?" Calls Wolpis Carter "Wolpis," Elno "Noeru," and Risru "Risru-san." Age: 30.