Frank (フランク, Furanku) is a homunculus created by Huey Laforet. He is kidnapped by Renee's team of scientists during the raid on the Russo Family Manor, but is recovered by Huey at the end of 1934. He is a member of the Lamia and a good friend of Rail.
Frank is at least two meters tall, but has the body proportions of a toddler: his head is proportionally big, and his body is extremely wide to the point where he looks like a beer barrel with a head and limbs. He has short brown hair, and is seen wearing blue overalls over a white shirt.