13 Month Series

The 13 Month Series consists of an Arms Inventory and 12 sentient weapons made by a craftsmaster, Ashul Edwaru. They are bestowed by the King Zahard to a formal Princess. This Series has great importance and a member of the RED called Lo Po Bia Ren was sent to retrieve the Green April and later, the Black March when they appeared on the 2nd Floor.

The Rainbow Undecimber is actually an Arms Inventory and it's unknown what special attributes the Rainbow Undecimber possesses.

The 12 sentient weapons vary in shape and function. For instance, one is a Needle and another a Hook. Out of these weapons, only the Gold November has an S-Rank.

They are like half-beings and have human forms sealed within. When Ignited by the user, these forms will be unsealed and unleash the extreme powers of the weapon. Only a formal Princess can ignite a 13 Month Series(Ch 65), though there're exceptions like Anak Zahard or Baam. And this restriction might be related to the qualities of the Princess possesses or some other factor.

No matter how skilled the Princess is, she cannot force a 13 Month Series to Ignite. Depending on the weapon's personality, it may refuse to listen to its' owner. For example: the Black March will only activate for "Good Looking men" and it won't listen to anyone else. Only Baam managed to Ignite it while despite her rank of 500th, Yuri Zahard was unable to Ignite the Black March.

Finally, when weapons of the 13 Month Series meet, they will resonate and their owners can feel it(Ch 19). It is unclear if the same condition applies to the Rainbow Undecimber.

Receiving a 13 Month Series
Only a formal Princess can be chosen to receive a 13 Month Series(Ch 32), provided she accepts it. And all formal Princesses are Rankers(Ch 32).

Rules binding a formal Princess
When a formal Princess accepts one of the Series, she automatically takes part in a set of rules.


 * 1) She may not give or even lend a 13 Month Series to another person or she will be executed by the King(Ch 2). And it is likely some or most of the people accompanying the Princess will be executed too, for failing to prevent the 13 Month Series from leaving her hands.
 * 2) It is also unknown what punishment is meted by the King, when a Princess goes missing with a 13 Month Series.
 * 3) It is possible a Princess may challenge or even kill another Princess for her 13 Month Series but this is currently unconfirmed. It's true the Ha Family is hoping Yuri Zahard will collect all of the 13 Month Series so there may be some truth to this.

Note: Heice Zahard, upon becoming a Ranker, was presented with a 13 Month Weapon but she turned it down for reasons unknown.

List of weapons & Current owners

 * Silver January -
 * White February -
 * Black March (Needle)- Yuri Zahard > Baam > Anak Zahard > Yuri Zahard
 * Green April (Hook)- Anak Zahard (Original) > Anak Zahard > Yuri Zahard
 * Yellow May - Koon Maschenny Zahard
 * Luminous June - Alphid Zahard (whereabouts unknown)
 * Indigo July - Uram Zahard > Garam Zahard (whereabouts unknown)
 * Blue August -
 * Dark September -
 * Red October - Arie Hagipherione Zahard
 * Gold November - Adori Zahard
 * Colorless December - Eurasia Enne Zahard (sealed)
 * Rainbow Undecimber (Arms Inventory)

Notes and Trivia
The 13 Month Series all have their names engraved on them. The engraving is in Japanese, because their creator Ashul Edwaru uses a language based on Japanese. SIU has (in his blog) made it clear there is no significance behind this, and that the use of other languages also will occur. It's possible the 13 Month Series may be based on the Japanese Kiku-ichimonji swords, which follows a similar theme of one sword for each 13 months, including one intercalary month. However, it's also possible there might be no relation to these Japanese swords.