A/N: SAIKOU HAKKOU!
A Kamen Rider
And also a sentient sword
Summons a shadow
A/N: Saikou's name is a combination of the Japanese words for Greatest (最 Sai) and the compound variant of Light (光 Kō), translating the name to Greatest Light. It is also a pun on the phrase the best (最高 Saikō).