Null

Null is the 12th visitor to the facility, and the first ship the player will have access to upon first playing the game.

Story
Null is 12th visitor to the facility, and enters seeking the eternal power. He is rivals with D-13, the thirteenth visitor, and a fight takes place between them during the tutorial. Regardless of who wins, D-13 races into the facility and Null goes down after him.

Once Null falls in battle and returns to the surface, he crosses path with Kleins, a cat seeking to amass a fortune from the facility. Kleins aids Null by selling him items to help him travel deeper into the facility, and earns a profit by doing so.

If Null defeats the Overlord and possesses all 4 seals, he can continue to the 6th floor, which contains the Power Eternal. His story ends upon fighting the Machine, and entering a conduit to attain the Power Eternal. If this point is reached as D-13 during hard mode, Null will replace the Machine as the final battle in the form of the Monolith. He is eventually defeated and falls back down to the facility, and can be seen destroyed while D-13 returns from the sky in the ending.

Null was created by the the Trader’s master along with the other visitors, but not much is known about his origin besides that.

Gameplay
Null is the first playable ship unlocked upon first playing the game. In order to unlock D-13 (hard mode) and all the other ships, you must defeat the Machine on the 6th floor as Null. Aside from the difficulty, Null is identical to D-13 in terms of strength and starting weapon. Null is considered as the normal gameplay style of Monolith

Null’s default weapon is a rapid fire single shot, similar to a Vulcan with no keywords. It has infinite ammo, and is used when Null does not have a normal weapon with ammo. Like most of the other ships, Null starts with two max bombs which can be upgraded by one from an upgrade terminal, or downgraded by one from a shrine.