Vampire Princess Miyu Series by Narumi Kakinouchi, Toshiki Hirano

With her eternal life of hunting stray shinma, Vampire Miyu's life gets complicated when old friends and bitter enemies reappear. For with their presence comes a new challenge to Miyu's power: Reiha, ruler of the Third Tier! Reiha thinks little of Miyu's skills and relaxed attitude towards humans. No, the frigid Reiha has no time for pity or friendship... moreWith her eternal life of hunting stray shinma, Vampire Miyu's life gets complicated when old friends and bitter enemies reappear. For with their presence comes a new challenge to Miyu's power: Reiha, ruler of the Third Tier! Reiha thinks little of Miyu's skills and relaxed attitude towards humans. No, the frigid Reiha has no time for pity or friendship. And the return of several embittered Western Shinma, Lemures and Carlua, seem to make Miyu's life even more difficult in the face of Reiha's icy interference... less

Manga trade style comic.

Miyu is an eternally youthful, 13-year-old vampire. Her peculiar appearance; golden eyes, pale skin, and hair tied with a ribbon in a strange fashion, are concealed during the day. Miyu is the Guardian (or Watcher), whose duty it is to return the Shinma - god-demons that prey on humans - to the dark. She has the power to call forth fire, which burns Shinma and sends them to the dark. Her only companion, friend, and protector is Larva, a Western Shinma who is bound to serve her... moreMiyu is an eternally youthful, 13-year-old vampire. Her peculiar appearance; golden eyes, pale skin, and hair tied with a ribbon in a strange fashion, are concealed during the day. Miyu is the Guardian (or Watcher), whose duty it is to return the Shinma - god-demons that prey on humans - to the dark. She has the power to call forth fire, which burns Shinma and sends them to the dark. Her only companion, friend, and protector is Larva, a Western Shinma who is bound to serve her. Together, they hunt stray Shinma across Japan. How Miyu became a vampire is unknown, so is how and why she became the Guardian. However, more mysterious is the gift she bestows on the people she feeds from... less

Miyu has died at the hands of Larva, whose tie to Miyu was broken by the "Dark Exorcism." During this fatal moment, the battles between the Shinma have escalated. Now Miyu must be resurrected! Ranka, the Sentinel of the Japanese Shinma's second layer of guardians, sent the youngster Ichiro to find the Princess of the Shi Clan--Yui--who has been baptized in Miyu's blood. She is the key to Miyu's ultimate revival!

Vampire Yui reappears in Miyu's life, but all is not well with young Yui. Then the ice spirit Reiha's interference causes more problems than it solves. In truth, Reiha cannot stay out of Miyu's business, intruding time and again, much to Miyu's growing anger... How long with this go on?