Look how fucking malevolent the bridge of the Musai looks. It’s a giant grinning demon and that is rad as hell.

Musai (Ancient Greek: Muses)

They don't feel guilty about the death and destruction that they cause, thinking that they have done nothing wrong. They believe that a short, artistic, and passionate life is better than living a long life with untapped potential. They are passionate about art and target artists or those with untapped creative potential, such as authors or composers. They claim to be able to sense untapped power in people, which is what draws them to their victims.

They normally target one victim at a time, and once their first victim ends up dead or insane after creating masterpieces, they move on to their next target. The relationship between the Musai and their victim causes the victim to become obsessive, willing to kill or die to be with her, which can convenient for the Musai when they decide that their previous victim is better off dead for causing too much trouble. The only way to cure the effects of a Musai's kiss is with true love.

Concept idea for a unicorn brought to life by wood, who protects the trees/forest.

The coloured drawing below is of a Musai, from an episode of Grimm i had been watching at the time.

Episode 39 English title: The Newtype: Challia Bull Original title: ニュータイプ、シャリア・ブル (Nyuutaipu, sharia buru)