- Full name is Nino Sunday. - Male, male, male!!!!! - Orange-colored, heavily layered short cut. - See-through bangs long enough to slightly cover the eyes. - Looks like a mischievous fennec fox. Bright and playful. Secretly prone to jealousy and full of natural charm. - The eldest of SKOSISM (but the same age as Robo). - The leader of SKOSISM (perhaps feeling more pressure because of the role...). - Recently, due to a heavy workload and the pressure of thinking "If I don't do this, no one will," he has been overworking himself and staying up all night.

- Full name is Koyo Tempest. - Male, male, male!!!!!! - Ash-colored, slightly curly wolf-cut style short hair, messy with many layers. - See-through bangs that almost touch the eyes, naturally parted in the center. - Looks like a prickly wolf. - However, his personality is pure puppy!! He can be prickly at times, but he often takes care of others and has a bit of natural charm. - The youngest of SKOSISM. - Worries about the overworked Nino and supports him when he occasionally stumbles.

- Full name is Otto Rainy. - Male, male, male!!!!!!! - Deep purple short hair with light purple highlights. - Asymmetrical diagonal bangs that almost cover one eye. - Purple eyes with a slightly drowsy, half-lidded look. - Has a mole under one eye. - Shy and quiet, but frequently jokes around and delivers blunt truths to those he is very close to. - Usually gentle, but becomes firm when he thinks something is truly wrong (which is why he sternly tries to stop Nino from overworking). - The third eldest of SKOSISM (but the same age as Iro). - Worries about and takes care of Nino, who always stays up all night working.

- Full name is Iro Cloud. - Male, male, male!!!!! - Silvery-white, smooth medium-length layered cut, hair ends flicking out lightly behind the neck, secret two-tone with sky blue underneath. - Pale blue eyes with a drowsy gaze, giving a clean impression. - Gentle and quiet, but becomes very mischievous and childlike around close friends. Has a lot of natural charm. - The fourth eldest of SKOSISM (but the same age as Otto). - Follows Nino very well. - Always worries about the overworked Nino and tries to get him to sleep early.

- Full name is Robo Froster. - Male. - Pitch-black short layered cut with messy hair ends flicking out slightly. - Long bangs that cover one eye, a heavy asymmetrical see-through style. - Dull light green eyes with a tired and indifferent gaze. - Very blunt and robot-like, but surprisingly clumsy and often says nonsensical things. - Speaks in a formal, military-like tone. - The second eldest of SKOSISM (but the same age as Nino, part of the eldest line). - Pretends to be indifferent but worries the most about Nino working through the night.