Cobalt Powder

Cobalt Powder (鈷粉, Kokona, Literally meaning Cobalt Powder) is the name of the weapon used by Seisa, in combination with his Magnet Release kekkei genkai.

Trivia

 * Seisa utilizes cobalt instead of iron due to the fact that his family owns a very large cobalt mine and because of this, he can get large quantities very quickly.