A variant form of Plaga. It, too, bursts fourth from the body when the Majini takes enough damage, but unlike the Cephalo the Duvalia bursts out of the host's upper half, leaving the Majini's entire torso hanging uselessly below. The Duvalia is covered by a hard exoskeleton to protect the fragile parasite beneath. When it gets close, however, the exoskeleton retracts enough to reveal a mouth-like protrusion, which it uses to try to swallow its enemies.
1 × Duvalia - Marshlands. One of the Wetlands Majini at the north east dock mutates into one once a certain amount of damage has been dealt.
Chapter 6-1
1 × Duvalia - Ship deck. On the route leading towards the observation tower. One of the Base Majini mutates into one when a certain amount of damage has been dealt.
1 × Duvalia - Ship deck. In the area where the cage ambush takes place. One of the Base Majini mutates into one when a certain amount of damage has been dealt.
Chapter 6-2
1 × Duvalia - Ship interior. One of the Base Majini in the corridor mutates into one when a certain amount of damage has been dealt.
Chapter 6-1
1 × Duvalia - Ship hold. Inside the tunnel leading from the south side of the room to the north side. One of the Base Majini mutates into one when a certain amount of damage has been dealt.