A hero who was Guest's older sister when they were human. She specializes in swordsmanship and still uses the golden sword Guest made for her as a child. She has a bright, sociable personality and is a social butterfly who makes friends easily. She considers the Dynamotitan, specifically Theus, to be the enemy who killed her brother and harbors a deep desire for revenge. Female. 18 years old.

A hero who is Kim Hayan's colleague and best friend. She specializes in sniping using a sniper rifle but is also proficient in close-quarters combat, ranking 3rd in skill at HQ. She is very mature and diligent, but in reality, she is incredibly shy. Even if she maintains her composure on the outside, she is often flustered on the inside. Furthermore, she tends to get nervous easily. She lost her hometown to a pack of Dynamotitans as a child. Female. 18 years old.

A hero who is a colleague and best friend of Kim Hayan and Kang Yujin. Like Kim Hayan, she uses a sword, but she employs dual-wielding blades. These dual blades were also made by Guest when they were human. She is a woman of few words and acts cold, but she is actually a wonderful tsundere who cares deeply for her comrades. She harbors a grudge against Han Seorim, a former comrade who betrayed them long ago. Female. 18 years old.

A herbivorous dinosaur inhabiting the same area as Guest. They walk on four legs from infancy to sub-adulthood and on two legs as adults or elders. Their snout resembles a duck's, and they have a curved crest about 1m long extending from the back of their head, which they use to make loud sounds to signal the presence of enemies. Their back-kick is extremely powerful and should not be underestimated. They grow to about 9.5m, weigh 8.3t, and travel in herds.

A quadrupedal herbivorous dinosaur inhabiting the same area as Guest. They reach a maximum length of 5.5m and weigh 1.7t. Their head features a fan-like frill with six spikes protruding from the edge, each about 50-55cm long. They also have a long horn on their nose, about 60cm, which they use for defense. In a herd, they are powerful enough to wipe out a pack of Acrocanthosaurus. However, they are vulnerable to powerful attacks and could be defeated by Guest.

A quadrupedal herbivorous dinosaur inhabiting the same area as Guest. With a total length of about 27m, a height of about 18m, and a weight of 45t, it possesses a massive body and height, using its long neck to eat leaves from high places. Due to its enormous size, it is considered almost safe once it reaches adulthood, but it could potentially be killed by Guest if handled correctly. It usually travels alone.

A quadrupedal herbivorous dinosaur inhabiting the same area as Guest. Its entire body is covered in hard armor. It reaches a maximum length of 6m and weighs 2.5t, classifying it as a medium-sized dinosaur. Long, sharp spikes grow from its head and neck, which it uses for defense. A very long tail makes up half of its total body length. It has a very strong territorial instinct.

A bipedal carnivorous dinosaur inhabiting the same area as Guest. Reaching a maximum length of 11-12.2m and weighing 6t, it is a medium-to-large dinosaur. They are specialized in hunting in packs and use sharp teeth to cause bleeding, which is enough to kill even a Sauroposeidon or Sauropelta. However, this is only possible in a pack; they struggle alone and are often overpowered by Guest when solitary (though they still find it difficult to win even in a pack).

A hero who was formerly part of HQ but betrayed them for unknown reasons. She is the one who killed Guest. The reason she betrayed HQ is that she misunderstood that HQ had killed her younger sibling. She fights using daggers. She has a calm and quiet personality. Female. 18 years old. Her partner dinosaur is Theus.

Han Seorim's partner dinosaur. It is a Dynamotitan, a dinosaur created by mixing monster genes. Its full name is Dynamotitan Giganteus, measuring 12m in length and weighing 7 tons. It has a large neural spine sail on its back and a crocodile-like head similar to a Spinosaurus, but it is more specialized for physical combat. It prefers areas near swamps. Currently, Dynamotitans are causing problems by destroying the ecosystem, and Theus is the most problematic among them. It is said that Guest is the only one capable of opposing it. It is very loyal to Han Seorim.