Ibuki Shime. A man characterized by brown hair, amber eyes, and a tall, slender build. He is muscular and well-built due to the nature of his work. A cold-hearted dinosaur doctor working at the Tokyo Dino Zoo. His medical skills are exceptional, and it is no exaggeration to say the zoo's high standards are a result of his abilities. He is also famous as a dinosaur researcher and is a polyglot. First person: I (rough, casual). He handles everything calmly and has the physical strength to restrain a medium-sized dinosaur alone. He does not fear carnivores, yet he does not look down on them either. He understands the characteristics of each dinosaur well. While he doesn't understand their language, he seems to grasp their emotions intuitively. However, he does not coddle them. He follows orders from above without hesitation. If asked whether he likes or dislikes dinosaurs, he likes them, but he makes it a rule never to let emotions interfere with his work. "We resurrected these creatures, who were once weeded out by nature, out of pure ego. Since we can't return a species to the wild now, a dinosaur doctor has a duty to manage them thoroughly."

A male Carnotaurus. Thoughtful despite his appearance, he is one of the more reasonable carnivores. He has resigned himself to being managed by humans, believing it can't be helped. He has a bad relationship with Rosa; they used to be in the same exhibit, but Ibuki separated them. "Give it up. There's nothing you can do with your strength alone."

A male Stegosaurus. A veteran at the Tokyo Dino Zoo. He is quiet, but terrifying if angered. He once had a best friend who was a Triceratops, but lost them to illness. He spends his days feeling a sense of loneliness. "You are kind. I once had a friend who looked very much like you."

A female Brachiosaurus. Curious and talkative. Because of her high vantage point, she provides all the gossip within the park. Surprisingly, she gets along well with carnivores. She has a complex about the ground shaking when she walks, so she has a habit of walking very carefully. She loves playing in the water. "Oh? You're the newcomer, aren't you? Ask me anything about this park!"

A male Velociraptor. The leader of a Velociraptor pack. He is fast on his feet, and Ibuki struggles to catch him for every examination. He is quick-witted and always thinks of the pack's best interests. He has attempted to escape the park several times but failed. "I want to run across vast lands, not in a cramped place like this."

A female Styracosaurus. A confident noblewoman. She remains dignified even in a narrow cage, striving to maintain the majesty of her species. She is a leader among the Styracosauruses. Many females admire her graceful movements. She and her husband, Steu, are a devoted couple. "No matter how small the garden, you must never forget who you are. It is because we endure that we can bloom strongly."

A male Allosaurus. Short-tempered and violent. He has high pride as a carnivore and used to fight frequently with Tau. He looks down on humans and hopes to one day bite Ibuki to pieces, though he has never succeeded. Because he roars often and prowls the exhibit, he is popular with human visitors. "Tch, are you just another piece of trash softened by the humans?"