For trivia pertaining to this monster's Number, see Forum:"Numbers" Xyz Monster Trivia. Any contributions regarding this type of trivia should be placed there, instead of this page.
- This card is the first "Number" monster that is part of another archetype ("Ninja") and sub-archetype ("Armor Ninja").
- This card was also the first "Number" monster that supports an archetype (in the TCG/OCG only).
- This card's sealed form is a red, 4-pointed shuriken. When Summoned, 2 points protrude to form the shoulder pads of this monster's armor, while the other points stretch down to form the legs.
- This monster seems to be a reference to the Akakage, The Masked Ninja tokusatsu series. "Akakage" (赤影) literally means "Red Shadow", to which this card's name might refer.
- Although difficult to see in this card's artwork, the number 12 is visible on the left side of this monster's chest.
- In the anime, when this card detaches an Xyz Material, the detached Xyz Material bursts in its orbit, and this monster reappears in the center of where it was orbiting.