The NefeloMakion (ネフェロマキオン) is the name of Astel's spaceship from the other dimension. It is seen in his debut lore video^[2] and in the extended version called Project Gemini vol. α'^[3].

This ship is also where the Hajimari no Kioku game takes place^[4].

Before Astel's debut on December 7, 2019, the following events take place in the other dimension:

• Astel gathers a crew for NefeloMakion from different planets, with Merck being one of the first members^[5].
• The events of the Hajimari no Kioku game take place. A mystery occurs onboard which the crew attempts to solve^[6].
• While the ship is enroute to attempt a takeover of the earth, there are sounds of explosions onboard. There is confusion from Astel where the attack is coming from and acknowledgement that it is too fast to have come from earth^[7].
• The ship crashes into the waters of the earth, specifically in the area of the Bermuda Triangle^[8].

The current status of the ship itself is unknown, but the members of the crew still seem to be together as seen during Twin Crew Stars^[9].

There are 9 named crew members of the NefeloMakion^[11].

• Astel Leda, Commander. Gathered the crew together. In charge of deciding the overall direction of the ship and its crew.
• Haruto, Vice-Commander. Assists with fundamental/basic tasks like facilitating meetings, etc. He is more of a systems support (catering to the whole ship's affairs) rather than a personal one to Commander Astel. His left eye stays closed at all times.
• Merck, Goods Procurement Officer. A very reliable individual with a strong sense of justice. He infiltrates dangerous places and carries out espionage missions on a daily basis. He trusts Astel with all his heart.
• Phruity, Plants/Vegetation Officer. Loves the Commander. She manages the edible plants on board the ship. She makes the food that everyone eats. Delicious!
• Arecos, Combat Vanguard Officer. Taciturn. Doesn't really like to communicate. When it comes to combat he becomes rampageous, as if he's a different person.
• Juke, Spacecraft Helmsman. Sociable but mysterious. Comes from a special race with spells carved onto their bodies. Has lightning powers. Do you also have a spiritual side?
• Knoll, Record Keeper / Records Officer. Cheerful. Always smiling brightly. She records all sorts of information in her magic book. Maybe even your personal data…
• Uratty, ??? / Position Unknown. Finds things troublesome. Someone who usually can't be bothered. He's always holed up in his room playing games. A gamer. I wonder what he's in charge of…
• Stridon, Space Navigation Officer. He has a big heart. Everyone's big brother. He's able to “read the flow” of things. Tolerant and able to forgive anything. Fights with a trident.