Ikupasuy

The ikupasuy (イクパスイ) is a prayer stick and good luck charm used by the members of the Ainu Tribe.

About
An ikupasuy is a carved wooden stick used for prayer by the Ainu Tribe and the carvings have a very deep meaning to the Ainu. It is also a good luck charm and the one carrying it will be protected by the gods.

The one carried by Usui Horokeu was crafted to him by his little sister, Usui Pirica, and would later become the main medium for two of his Over Souls.

Anime/Manga Difference
In the 2001 anime series, it also served as the medium for Horokeu's Giant Over Soul.

Trivia

 * In the Ainu language, ikupasuy means "libation stick" since they would be dipped into alcohol during religious ceremonies.