Astral World

The Astral World is the dimension where Astral was born.

It is first seen when Astral obtains a memory as as result of acquiring "Number 34: Terror-Byte". Astral had not previously remembered where he came from.

Astral later recalls the Astral World under attack, being hit by numerous explosions as its unseen inhabits scream. This is later implied to be due to the actions of Hart Tenjo at the instruction of Dr. Faker and Mr. Heartland. Hart would transport large amounts of trash through a small rip in space into the Astral World, where they would detonate.

When Kazuma Tsukumo fell from a cliff in a snowy mountain during one of his explorations with his wife, he landed in the Astral World, and obtained The Emperor's Key. It is unknown if that was just his spirit as his body was severly damaged when he woke up.

It is suggested that the Astral World has a counterpart called the Valian World. Kite Tenjo correctly guessed that using a stone from that world found inside Orbital 7 would open the Emperor's Key, which comes from the Astral World, and he mentioned the world itself when Astral questioned him about why he hunts the "Numbers".

The Astral World and another world sent a wave of energy that collided with the world where Yuma Tsukumo and Astral currently are, causing time to temporally stop and a sun from each world to appear. Dr. Faker explained that it is because the worlds are getting closer. Dr. Faker also said that something bad will happen soon because of this.

When Tron begun the ritual to take Hart's powers, the former was able to briefly see Astral World while taking more power from the latter.

According to V, Kazuma Tsukumo is alive in the Astral World, and the Tron Family seems to familiar about the world too, as III recognized Astral as an being from it when he briefly saw him.