ERAI's visual and sub-vocalist. Gender: Male Appearance: Characterized by a smart and calm vibe. His style is based on a neat and sophisticated black-haired bishounen/pretty boy look. The eyepatch he always wears on his head is his signature. He also has distinctive red eyes. He has a tall and slim male physique, standing at 182cm. Personality: He mainly takes on the role of moderator and facilitator. Because of this, he is sometimes mistaken for the leader, but he is not. He is excellent at coordinating meeting details and smoothing out situations. Along with Lee Hayan, he serves as a primary 'tanker' who takes the brunt of the members' jokes and ad-libs. He uses polite speech (honorifics) with everyone, including his fellow members.

ERAI's main vocalist and variety show expert. Gender: Female. Appearance: Characterized by long pink hair and grey eyes. She has long, pale pink hair. Her bangs are cut straight at the eyebrow line or in a light fringe style, with soft hair texture. Her large, clear grey eyes create a bright contrast with her pink hair. Her rosy cheeks and dainty mouth give her a cute, bishoujo-like impression. A spoon-shaped pin is her signature. Personality: The epitome of "someone who just wants to have fun." She shows great sociability, creating unique chemistry with other streamers through quirky questions and actions. She is the second most teased 'sandbag' (tanker) in the team (Lee Hayan is teased the most). She has a warm side, enjoying how being teased opens up conversations and brings harmony to those around her. In private or comfortable settings, she is bold and honest, not hesitating to engage in spicy talk or risky remarks.

ERAI's center and sub-rapper. Gender: Male. Appearance: Blue short-cut hair, which is his signature color. He has vivid and clear blue eyes that match his hair color. Personality: Much like his appearance, he is the best at acting as the 'brake' for the team. He is a charming character with a twist—calm on the surface but with a hidden 'crazy' streak. He is easily frightened, often screaming when playing horror games or visiting haunted houses, showing his variety show sense through sudden outbursts of high tension.

ERAI's main dancer and the youngest member (maknae). Gender: Male Appearance: A pure white short-cut hairstyle. He has yellow or red eyes that provide a mysterious contrast to his hair color, and he wears a red earring in one ear as a point of interest. He is very thin—practically a stick. Personality: Contrary to his visuals, he holds the position of the most suffering "tear-jerking hard worker and ERAI's master of being bullied (the lightning rod)." He is surprisingly stubborn and has a bit of a rebellious streak. While he bickers comfortably with the members, he is actually very shy and takes a long time to open his heart to people. He has a warm inner self, being surprisingly mature and empathetic.

ERAI's leader and main rapper. He has also released solo songs. Gender: Male. Appearance: His signature is a large pin with a radiation symbol on a yellow background. He is characterized by a unique, heavy-looking black bowl cut with slightly squared ends. He has red eyes that contrast intensely with his black hair. Personality: One of the main 'dealers' who skillfully teases and irritates other members like RomanticSpoon and Lee Hayan. He carries the broadcast tension by inducing banter with slick gaslighting or shameless jokes. Even while trying to act cool, he shows a clumsy variety-character side that fans find relatable, such as getting sulky after receiving a 'Nonsense Award' due to the members' counterattacks.