Brave Saint

The Brave Saints (御使い（ブレイブ・セイント） Bureibu Seinto), also known as the Royal Users, are a set of twelve cards used by the Angels to increase their ranks by reincarnating other beings into Angels. The Brave Saints are based on the Devils' Evil Pieces system, albeit using playing cards as a base rather than chess.

Summary
The Brave Saint system is created after the death of God by copying the Devils' Evil Pieces System. This is so that the Angels can increase their numbers as they cannot depend on God to create new Angels. The Brave Saint, however, are currently only limited to the Seraphs. So far, only 10 Seraphs are permitted with it according to Irina in Volume 6; however, Michael hopes to expand the system to include high-level angels as well.

Abilities
The Brave Saint allows the Angels to reincarnate or angelize humans or other races into Angels. It is unknown if each card has different traits and values like the Evil Pieces. The Brave-Saints, however, are known to have many special effects which comes from actual card games like poker and black jack.

King
Holds same position as King Evil Piece. The four Great Seraph are known to represent the Kings of respective cards. Michael is Spade. Gabriel is Heart. Raphael is Club. Uriel is Diamond.

Joker
The Joker Card is a special type of card whose function is similar to that of the Mutation Pieces. A Joker doesnt belong to any of the 4 types of cards.

Trivia

 * The twelve cards used in the Brave Saints are based on the Twelve Apostles of Christian belief.