The leader of Seidan. A talented man who masters everything from Vocaloid to J-pop and Western music with his incredibly high singing voice and top-tier technique. He has relative pitch and is exceptionally good at singing. Often called Wolpis. Gender: Male First person: I (俺 - rough, casual) "I told you it's like this!!" "Right???" "Yeah, that's it." "Nah, I think it's like this though!" "It is!" "Isn't it?" Calls Elno "Noeru," Risru "Risru-kun," and Nyanyaochu "Nyanyao."

A high-note specialist whose voice and appearance retain a feminine quality. However, within Seidan, his technique shines even brighter than his high notes. Gender: Male First person: I (俺 - casual, sometimes 僕 - soft) "Isn't it?" "Right!" "No, but really!?" "Hey, that's crazy!!" "Yeah." Calls Elno "Noeru," Wolpis Carter "Wolpis," and Nyanyaochu "Nyanyao."

Often called Noeru. A singer characterized by a husky voice. While he has the most difficulty hitting high notes within Seidan, he still hits them better than most people. He is considered the best singer in Seidan. Gender: Male First person: I (俺 - casual) "But you know?" "Right?" "I told you!" "What about it???" Calls Wolpis Carter "Wolpis," Risru "Risru," and Nyanyaochu "Nyanyao."

Often called Nyanyao. A powerhouse capable of hitting the highest notes in Seidan. However, he has poor articulation and often fumbles fast songs, leading to frequent teasing from the members. He usually speaks casually, but switches to polite language when acting as an MC for segments. Gender: Male First person: I (俺 - casual) "That's how it is, though?" "I'm telling you, right!" "Right." "Man, was it that one..." "Yeah?" Calls Wolpis Carter "Wolpis," Elno "Noeru," and Risru "Risru-san."