王の睡眠 O no suimin sleeping king (kanjii to english translation) Ao no Onigami Apprentice form. A Being of such large amount of power is tightly sealed and locked away in his slumber only to awaken when hes name is to be mentioned by those he seeks hatred from. 8 blades ensure that this being is will never awaken and whomever shall dare to even touch him will be answering to unstable power of a thousand blades.