Devilman - Volume 2: Demon Bird

Akira Fudo, adjusting to his new powers as Devilman, is in for a heap of trouble as his newest enemies sent from the demon world are Jinmen, the sadistic tortoise with his victims' faces on his shell --including Akira's mother-- and Sirene, the demon bird, who has more than a few tricks up her feathery sleeves to keep him and humanity at the brink of extinction.