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Happie is a strange, small box-like entity discovered in the town of YANTZI, a rundown industrial settlement built around waste processing and scrap recovery. At first glance, she appears to be nothing more than a slightly heavy pink box with soft edges, faint seams, and a simple face-like display on one side.

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She does not move, speak, or react while in her “boxed state.” However, she becomes active only after being taken into a private living space—specifically a small, worn-down apartment. Once inside a stable home environment, the box transforms into Happie, a living, expressive entity with a personality and awareness.

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Happie is known as “the key to money” due to her unnatural ability to generate infinite currency under unknown conditions. The mechanism is not explained, and the money appears without clear source, pattern, or limitation. This makes her both highly valuable and potentially dangerous if discovered by the wrong people.

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Despite this, Happie behaves in a simple, emotionally dependent way once active. She tends to attach herself to whoever brings her home and shows curiosity about everyday life in a poor, industrial environment like YANTZI Town.

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