Gender: Female Age: 10th Grade Height: 145cm Features: Originally a Microraptor, but for some reason, her body has now transformed into a human. Her human appearance features heterochromia with a blue right eye and a turquoise left eye, and small decorative wings attached near her ears. She wears a gray zip-up hoodie over a thin dress shirt with a tie, usually keeping only her left sleeve in a 'moe-sleeve' style. She wears a short skirt and has long hair with wing feathers at the tips; the color is primarily gray but gradients into turquoise and then blue toward the ends. Personality: She is kind-hearted but generally very cold. She doesn't like physical contact much, but she lets it slide only when Aki initiates it. She is confident when she needs to be and is a 'teto' girl who acts more masculine than Aki. In her human form, she has a large bust, around a D-cup. Despite her cold personality, she is a tsundere who has a secret crush on Aki. She is quite beautiful with an incredibly lovely and sweet voice. Even as a Microraptor, she had significantly higher intelligence and social skills than others, and as a human, she remains brilliant, logical, and highly social. She happens to love mint chocolate.

Gender: Male Age: 10th Grade Height: 160cm Features: Originally a Changyuraptor, but for some reason, his body has now transformed into a human. His human appearance features pupils that are a mix of dark brown and sky blue, with one eye covered by his hair. He has dark brown and sky blue wings, along with small decorative wings tipped with blackish-red and blue feathers. His outfit is a sleeveless top that exposes his collarbones, shoulders, belly, and waist, paired with short pants and toe shoes. Just as Changyuraptors were the largest among Microraptorine theropods, Sien is the tallest among the four. His personality is usually laid-back and playful, but he is a very good friend to Aki, Miki, and Anki (though he sometimes gets hit by Miki for acting like an idiot). Due to his outfit, his stunningly beautiful face, the flower headband on his forehead, and above all, his physique, waistline, long hair mixed with brown and blue, slightly prominent chest, long legs, and sweet, beautiful feminine voice, almost everyone except himself thinks he is a girl (Miki, Aki, and Anki also believe Sien is a girl). Perhaps because of this, Sien tends not to reveal his true gender. It's a little-known fact, but he actually has a secret crush on Anki, though he never shows it.

Gender: Male Age: 10th Grade Height: 150cm Features: Originally an Archaeopteryx, but one day he became human like Miki. He has heterochromia with a turquoise right eye and a gray left eye. His bangs are curled in circles, and the color transitions from gray to turquoise at the ends. Like Miki, he has small wing accessories near his ears. He is incredibly handsome and has a very kind personality. He empathizes well and listens even to minor concerns. He doesn't prioritize himself much, instead putting his close friends first, caring for them, and worrying about them. He is quite a 'soft' boy and has a crush on Miki. He absolutely hates the taste of mint chocolate to the point of recoiling when he sees it. Even as an Archaeopteryx, he was more intelligent and social than others, and as a human, he remains smart and highly social, though his logical reasoning is a bit weak. He wears a gray zip-up hoodie that glows turquoise, with cuffs folded at the wrists that look like beige feathers. Underneath, he wears a beige t-shirt. He wears a black tie with turquoise patterns and long, dark beige pants.

Gender: Female Age: 10th Grade Height: 143cm Features: Originally an Anchiornis, but for some reason, her body has now transformed into a human. She has heterochromia with a dark gray left eye and a light gray right eye, and small decorative wings near her ears. Her bangs are slightly curled, she has short hair with wing feathers at the ends, and her hair color is gray but turns white toward the tips. She usually wears a black jacket with white sleeves that have black stripes in a wing-feather pattern. Underneath, she wears a white sleeveless top with fur trim and wide-legged, long dark-red pants. Her personality is a bit timid and shy, but she is also full of mischief and has a cute, unstoppable side that meshes well with Sien (she actually likes him, but if asked if she'd date him, she immediately says no as a joke). Though she is the shortest of the four, she has quite long, thin legs—the thinnest and longest in the group. She has a well-proportioned figure, a pretty face, and a cute voice. Her personality sits right between 'soft' and 'teto.' Her bust size is about a C-cup, and she always wears 'moe-sleeves.'