Ten Hidou Species: Ocean Youkai Before Turning Youkai: A Black-Banded Sea Krait Enamoured with the Sky Ever since she saw a dragon take to the skies, Ten has dreamed of flying someday. Everybody told her sea snakes can't fly, but she never let go of her dream or her fascination with the sky. Despite possessing a deadly neurotoxin, she is a kind, gentle soul and doesn't like hurting others. She can be a little stubborn sometimes, though. She can change the size of her tail at will. At its longest, it can stretch to over 13ft. She loves anything to do with the sky.