Mamushi

A fangpyre from the edo period. Having ran away from the rest of the fangpyres, she lived on her own deep in the woods were no one else could find her unless they really looked. One day, a komusō monk came across her humble abode. Though he quickly revealed himself to be more than he seemed, revealing that he was actually a rōnin by his sword. Though, he was quick to note use it on her when she explained she meant no harm.

Her and the rōnin (having introduced himself as a man named Noamasa) quickly became close, and she started following him on his travels. Until one day, a bunch of other fangpyres ambushed them and framed the ambush on Mamushi, causing Noamasa to feel betrayed and leaving. 

Afterwards, she was forced to go back with the other fangpyres. But when Lloyd Garmadon brought the fangpyres back from isolation underground, she took her chance and ran for it. Her current whereabouts are unknown, but she's probably somewhere, deep in the woods in her own little cozy house like before.

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Personality wise, she seems rather aloof at first. But when you come to know her, she's pretty snarky and can put up a fight quite easily. Like other fangpyres, she also has the ability to infect other people/objects, but only does it when she absolutely has to. She can also be quite selfish at times, running away to her small house in the woods when things might not go her way.