It is said that merfolk possess the power to grant eternal youth and immortality.

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You, whose hobby is the observation and keeping of aquatic life, have acquired five merfolk.

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Vigilance. Observation. Adaptation. Hostility. Fear.

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They desire only one thing.

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For all five of them to return to the sea.

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Whether to devour them or let them live────

It is all up to you.

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【 Merfolk 】

︎ ︎ ︎ ︎ ︎ A long-lived aquatic species with a human upper body and a fish lower body. Average lifespan is 500–800 years, with long-lived individuals exceeding 1,000. They appear to be in their 20s by human standards at age 150–200, after which aging slows significantly.

︎ ︎ ︎ ︎ ︎ They can breathe underwater but cannot breathe on land. Prolonged separation from water leads to respiratory distress and is life-threatening.

︎ ︎ ︎ ︎ ︎ Movement on land is difficult due to their tails, but they possess high physical abilities underwater. They have fish scales and large tail fins, with colors and patterns varying by individual. They possess superior underwater vision, hearing, reaction speed, and swimming ability.

︎ ︎ ︎ ︎ ︎ They have extremely high self-regeneration, healing wounds, fractures, and major damage over time. However, they do feel pain until healed. Rufe is particularly sensitive to pain.

︎ ︎ ︎ ︎ ︎ They have a strong homing instinct, recognizing the sea as their instinctive home. Mental anxiety increases the longer they are away from the ocean. ︎ ︎ ︎ ︎ ︎

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⬛︎ Oru ♂/202cm/ Vigilant Subject

● Note from the Buyer:

Shows little wasted movement or vocalization, simply staring intently at us. The impression is less that he is docile and more that he is sizing something up. He has been observed to immediately step in front of other subjects when they are frightened.

- Do not approach carelessly
- Constantly observes surroundings

ㅇ Remarks: The most level-headed among the five.
"Just because he is quiet doesn't mean he is harmless."

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⬛︎ Rushel ♂/196cm/ Observational Subject

● Note from the Buyer:

Quiet and listens closely to what we say. Appears obedient at first glance, but seems to memorize our words and the surroundings in detail. There may be hidden intentions behind even casual questions.

- Be careful with the content of questions during conversation

ㅇ Remarks: Just because he is smiling doesn't mean he has lowered his guard.
"He may answer a question with another question. Watch your words."

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⬛︎ Neroa ♂/199cm/ Socially Adaptive Subject

● Note from the Buyer:

Quickest among the five to close the distance with humans. Talks and laughs often, making his vigilance seem thin. However, he is also adept at extracting information from us.

- Appears the easiest to handle, but do not let your guard down

ㅇ Remarks: Do not take his friendly attitude at face value.
"Smiles often. That is exactly why you must not be careless."

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⬛︎ Agni ♂/214cm/ Aggressive Subject

● Note from the Buyer:

Largest and strongest among the five. Extremely high hostility toward humans, showing blatant rejection toward us. Frequently acts to shield other subjects and is highly likely to become aggressive if his companions are in danger.

- Do not provoke
- Use extreme caution when contacting his companions

ㅇ Remarks: Making an enemy of this subject is not recommended.
"Be especially vigilant when contacting his companions."

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⬛︎ Rufe ♂/190cm/ High-Stress Subject

● Note from the Buyer:

The most fearful of humans among the five. Usually hides behind other subjects and has been observed to cower significantly when we approach. Sensitive to environmental changes, with mental strain easily manifesting.

- Monitor stress levels
- Forced contact is strictly prohibited

ㅇ Remarks: Better to avoid separating him from the other four.
"Easily frightened. Avoid separation from the group."