Tekka Yaguraba: 5 books

When the devil girl Patty finds she's too weak to summon an animal familiar, she chooses a human instead. His name: Norman Volcanello--an eccentric guy with a dangerous fascination with exotic life forms. As Patty and Norman set out to find her missing father, an offbeat adventure begins!

Devil girl Patty and her human familiar Norman have been traveling across the Devil World in search of Patty's trouble-making father. Their search becomes even more urgent when they learn that there's a warrant out for her dad's arrest! Will Patty and Normal find him before the authorities do?

Patty finally knows where her father is! That's good! He's in the capital city of Pandemonium, tearing the place apart! That's bad! Can Patty and Norman save the city...or will they just bring more chaos to the mix?

Patty, Norman, and Lasanil have traveled to the Dragon Bone Islands in search of Patty’s dad, but instead of finding him they bump into a figure from Norman’s past! Otto is an old military buddy of Norman’s from the Human World...and he absolutely hates devils. But when Patty and the others end up stuck in a haunted village, human and devil alike must work together to escape.

Patty and Norman are hot on the trail of Patty’s father, but they aren’t the only ones after dear old dad: thanks to a large bounty on his head, every bounty hunter in the devil world is after him! Can Patty find her wayward father before it’s too late?