Ko Hizuki

Ko Hitsuki (緋月コウ Hitsuki Ko) is a pure-blooded vampire and the son of the vampire king. Shin Hizuki is his older adoptive brother.

Personality
Ko is a brash but good-natured young vampire. He has a short temper and can be snappy around people, especially those he sees as weak (or those who see him as weak). Despite this he wants to do what’s best for others and comments that he’s happy that he and Shin were able to save Shino Yuki’s family. Ko seems to enjoy fighting.

He has a deep admiration for his older brother Shin and wants to protect him. Ko often tries to model his behavior around Shin’s.

Appearance
Despite being a vampire, Ko doesn't look any different from human beings. He has black, fluffy hair and red eyes.

After Ko loses his temper or specifically has heightened emotions, his ears develop pointy ends and his teeth become sharp, and he is surrounded by a dark fog. He manages to restrain himself and doesn’t transform into his full vampire form, but when he does transform, however, his black hair additionally turns white.

Abilities
Ko is capable of summoning a scythe using his own blood. He is also able to control and manipulate blood and can cause it to take on different forms such as scythes and spikes. Being a pure-blood royal vampire, Ko’s strength is far above that of even his vampiric peers— this is shown when he manages to decapitate several vampires in his vicinity with a single sweep of his scythe.