Ambush Creepers

The Ambush Creepers are a group of demons that ally with Blake Von Jaeger starting from Icy Shadows 5. At the end of Icy Shadows 5, Blake Von Jaeger tells Screamer X-29 and Scorch X-29 to abuse Sully X-29 for the fun of it. Other members of the Ambush Creepers join in.

In Icy Shadows 7, Blake Von Jaeger sends them after the DX-Clan after the Hoshi Kata failed him.

They are destroyed for good at the end of Icy Shadows 10 sans for Sully X-23 who is reborn as the human being Abram.

The Spooks
The Spooks are three powerful demons who ally with Blake Von Jaeger. They consist of Screamer X-29 (the oldest), Scorch X-29 (second oldest), and Sully X-29 (the youngest).

Other members
Among the Ambush Creepers are spirit like demons. They are less powerful than The Spooks, but know how to commit all sorts of evil acts. They follow Blake Von Jaeger's orders to a T. It is revealed in Icy Shadows 6 that they do not trust Sully X-29 and favors his two older brothers. This is due to Sully, who is originally a human child.