Pentagon is an angel-winged, high-flying Justice Choujin from California, USA. Aside from his obvious striking appearance, he is known for having the greatest jumping power in the Choujin community (for what that's worth), and for being popular with the ladies. In his first appearance, Pentagon primarily fights with his acrobatic aerial techniques, which ultimately ended with him getting gored by Warsman's Bear Claws. He got better somehow, and returned for the Dream Choujin Tag Tournament along with his cousin Black Hole, as the "4D Killer Combo". As part of his 4D wrestling style, Pentagon is now able to swap places with his opponent instantaneously, and he can literally stop time with the (appropriately named) Stop the Time technique. Why he did not make use of these moves in his earlier bout was not particularly explained.

Pentagon's favorite food is hamburgers. This is deemed important enough info to be mentioned both in his personal bio, as well as in the form of a remark in his image song.

Black Hole is one of the 7 Devil Choujins, and as his name might imply, his most distinguishing feature is a gaping hole where his face should be, which he can use to suck his opponents into a pocket dimension. On top of this, he is also a practicioner of "4D wrestling", which in Black Hole's case, apparently entails travelling through shadows, creating shadow clones, and teleportation.

Incidentally, Black Hole is the cousin of Justice Choujin and fellow 4D wrestler Pentagon, and despite their belonging to different, opposing factions, they regularly tag team together as the "4D Killer Combo".