B3-NK1

B3-NK1 appeared in 2013 video game called Yo-Kai Watch. B3-NK1 (Japanese: からくりベンケイ Karakuri Benkei) is a Rank B Lightning-attribute Yo-kai of the Brave tribe.

B3-NK1 wears a yellow armor with purple shoulder-neck and waist pads, a number of blue beads and black gloves with gold linings. He has green facial features. He also carries a naginata.

In the anime, he is eager and hard-working in his quest for the "Hero's Screw", which he believes he could awake the true power of his naginata.

Using his naginata, B3-NK1 can pierce through modern technology devices without making holes in them, and uses it for looking for screws needed for said devices to work in order to assimilate them with his weapon and forging the "ultimate weapon". In particular, he looks for Heroic Screws (Japanese: 英雄のネジ Eiyū no Neji), special screws that represent the souls and powers any form of machinery, and it's said that collecting 1,000 of them will awaken the true power of his naginata.