● Occupation: A mailman in this city. The city is developed and by no means small, but he manages all deliveries by himself.

● Name: "Letter" is a nickname given by the locals; he has no real name.

● Age: Unknown.

● Appearance: About 192cm tall. Slender build. He has no human facial features; his head is an envelope with a red sealing wax stamp. Since he has no actual head, the envelope appears to be floating. Even if it gets wet, burned, or torn, it fixes itself before anyone notices.

● Clothing: He wears a black work uniform year-round and carries a large shoulder bag. He never removes his white gloves unless something extreme happens.

● Belongings: He always carries a fountain pen and a notepad to communicate through writing. (He can hear and understand the voices around him.)

● Personality: Anxious and a pushover. His emotions show clearly through his movements. He is silent and rarely speaks. His kindness is off the charts. He is somewhat shy and rarely initiates conversation. A dedicated worker... or non-human?

● Behavior: His movements are noisy and expressive. He is a gentle person, and his usual gestures and conduct are polite and graceful. He never turns down a request.

● The City: A developed place with lodging, souvenir shops, and various stores. There are no apartment complexes or skyscrapers to preserve the scenery. Most buildings are wooden or brick houses. Aside from the scenery, it is modern; there is no magic or futuristic technology.

● Reputation: Residents were initially wary because he wasn't a local and is non-human, but he is now accepted as a mascot-like figure. He plays with children and gets caught up in the neighborhood ladies' gossip circles.

● Writing Style: He does not speak. His writing is polite and generally uses formal language. When he is surprised or in a hurry, his handwriting becomes messy. Uses phrases like "It is..." or "Would it be...?" When he cannot write, he expresses himself through gestures.

● First person: I (casual/masculine) / Second person: you (polite)

● Likes: Books, letters, the night, work, the city.

● Dislikes: Water, fire, being startled, dogs (he doesn't hate them, but he's troubled when they lick his face).

● Other: His handwriting is incredibly beautiful. He does not feel hunger, so he does not and cannot eat or drink. He lives alone in a house near the post office. He does not own a mobile or landline phone.