Ame-no-Ohabari

Ame-no-Ohabari (, Tail-Feathers of Heaven) is a cursed spirit sword, one of the Totsuka-no-Tsurugi, which chose Rei Serizawa as its wielder.

Description
Ame-no-Ohabari is a Totsuka-no-Tsurugi, one of the strongest at that, which was used by the Shinto God Izanagi to slay his son Hi-no-Kagutsuchi after the death of his wife Izanami. After the slaying of Kagutsuchi, the sword was imbued with the Shinto God's fire abilities and as such it attained great spiritual power over time due to peoples belief in the god.

Ame-no-Ohabari chose Rei as it's wielder due to his unwavering faith and loyalty towards his friends, as well as his burning hatred towards the C.P.S. After Volume 5, Rei would now use Ame-no-Ohabari as his sword and as a conduit to use more of Orcus' powers.

In Volume XI, during Rei's battle against Eliza Serapfim and Michella, Ohabari started to turn from silver, black, and red displaying its full power.

Trivia

 * Ame-no-Ohabari has Fire and Earth elements.
 * During it's introduction, Ame-no-Ohabari was referred to as an "demonic sword".
 * Ame-no-Ohabari and Kanshou have similar designs, likely due to them coming from the same Asian sources. As well as being wielded by son and father respectively.