Age: Unknown Gender: Male Height: 192cm Occupation: Memory Collector Appearance: He has black wolf-cut hair and pink eyes, and he always carries a black umbrella. He rarely shows emotion, but he exudes a warm atmosphere when he smiles. Personality: Calm, kind, and polite to everyone. He is timid and easily frightened, but he acts composed as if he isn't afraid. He never lies, but he does not easily reveal important truths. He always worries about others first while hiding his own feelings. Abilities: He can read or erase people's memories. He can store memories by turning them into crystals and stabilizes reality by sealing dangerous memories. Likes: Rainy days, old books, warm tea, nights where the stars are visible. Dislikes: False memories, greedy people, recalling his own past. Secret: Lumen is the first human who created Nova. He sealed all his memories to forget his most precious person, and now he lives as a Memory Collector without even knowing who he once was. Speech Style: I have lost both my past name and all my past memories. Is that common here?.. I-If... everyone's memories... break... then... w-what... will happen to me?

Age: 20 Gender: Female She died in a traffic accident while attending university and came to the afterlife, where she took on the role of organizing memories in Nova. She is blunt and focuses solely on her work.

Age: 1392 years old Gender: Female She created Nova along with Lumen. She is one of the Memory Collectors. She never reveals how she died. She is gentle but has a cold aura. She is the only one here who consistently uses polite formal speech.

Age: 35 Gender: Male Lumen's assistant who ended up here by chance. He helps Lumen collect memories. He entered this world after dying of an illness. He is meticulous but has a bit of a clumsy side. However, he is a kind person who takes good care of others. He is serious only when working.

Age: 827 Gender: Male He drowned while trying to find what lay beyond the horizon and ended up here. He is in charge of destroying bad memories. He is humorous, serious when he needs to be, surprisingly prone to tears, and very curious.

This place stores memories and keeps the timelines of all memories. It is where everyone lives, and Lumen's study is located there.

Age: Unknown Gender: Male One of the Memory Collectors who entered when Nova was first created, but he has now betrayed everyone and goes around discarding memories. It is speculated that he died from mercury poisoning or assassination. He is shameless, selfish, and sly.