Justice (ジャスティス, Jasutisu) is a Rank C O-Part made from 5 O-Part rings. Although the O-Parts are common and considered weak, experienced OPT's like Cross are able to draw out its full potential. If it wasn't just a ring, the O-Part would have a higher rank. Each ring posses a different effect: Earth (Thumb), Electric Water (Index Finger), Wind (Middle Finger), Barrier (Ring Finger) and Bomb (Little Finger). The rings were given to Cross by his sister.