Sword

The Saya's Sword is the signature weapon of Saya Otonashi, the main character of Blood+ series. It is a customized sword specialy made for use Saya's blood easly in combat. In the second half of the series, the sword was broken and replaced with a sword of diferent style but same purpose.

The First Sword
The first Saya's Sword has been refered as: "Kopesh" and "Sickle-Sword" because of it's shape or "One Night Kiss" by fans, but the sword itself is never named in Blood+ series. The sword is seen first in the first chapter of the series, under the custody of Hagi, who keep it in his chello's box, where it remains when is not in use.

The shape of the sword is that of a traditional katana modified in the base of the blade in the form of a "S", similar of those of the ancient kopesh or sicke-sword. The long of the rest of the blade have and extra "Hi", started in the S shaped curve, with three more cuts beggining in this. The idea is that Saya would be able to touch the curve of the blade and tu her finger (or hand) to let her blood run all the blade, making it a letal weapon againts chiropterans.

The true origin of this sword is not revealed. Although it may seem a modern sword, in a chapter when Saya remembers a past life, she is seen with this sword and seem to been using it for some time. It is speculate that it was given to her from Red Shield when she first made contact with them in the past (this may explain why the Red Shield has the sword during the Vietnam Incident).

During Saya's first confrontation with Amshel Goldsmith in Russia, the sword was broken in half and laved behind by her, although the blade part is found by David. This part may be used as base to forge the second sword sinc both have similar blade shape.

Saya's Second Sword
At the start of the second half of the series, Saya's broken sword is replaced by Red Shield with a new sword given to her by David, how called it "Fang", but is not revealed if it's the name of the sword (he said "This is your NEW Fang", and may refear that the first sword's name was Fang too) and is never called like that again.

Saya's Second sword was a katana too with similar purpose that the first but with diferent shape. In this new sword, the "S" shape is lose and relpaced by an extra metallic sharp section in the base of the blade, for Saya to cut her own hand and let her blood in the blade. This katana contained a chiropteran cristal recovered from George Miyagusuku, Saya's foster father and was suposed to give sentimental support to Saya. The rest of the blade is identical to that of the first sword, givin the clue that the Red Shield made the first sword as well.

In the final confrontation with Amshel Goldsmith, half transformed in his chavalier form, Saya gives this sword to Hagi with her blood, for he to finish Amshel. When the Metropolitan Opera House colapsed, Hagi, Amshel and the sword were buried and the fate of the sword remains as a mystery.