Allyson

Chapter: 1-2 · Urban District and Furnace Facility
Where: Urban District: the 2nd floor of the building across the street from the blue-door hut (the one with the Ithaca M37). You climb its outside stairs after taking the shotgun and find her inside with a male Majini.

Weak point

Before the Plaga emerges: a leg (stops her and her grabs) and then the rear finisher. Once the Cephalo is out: the Plaga, not the body. A Flash Grenade or Flash Rounds kill it instantly.

The blonde woman Chris and Sheva try to rescue. She has more health than a Town Majini and, after some damage, her head bursts into a long-reach Cephalo. Kill her before that: a leg shot and a Neck Breaker (Chris) or Throat Slit (Sheva) from behind, an instant kill that keeps the Plaga in.

The noise brings more Majini through the windows and both doors. Hold a corner; grenades help in the small room, but mind your own blast.

Reward

Ivory Relief (₦2,000), every time.

A regular Cephalo has 3,000 HP. Its tentacle hit does 180 and its vertical strike 360 (knocks you down up close). In co-op, one player shoots the leg while the other, already behind her, does the finisher.

Step by step

Take the Ithaca M37 in the hut before you cross the street: the shotgun makes short work of her.
Shoot a leg. While she staggers, circle behind her and use the rear finisher (Neck Breaker / Throat Slit). She dies with no Plaga.
On replays the Stun Rod, the Rocket Launcher or Nitrogen Rounds also stop the Plaga from coming out.
If the Cephalo comes out, back off (its whip reaches far) and shoot the Plaga: leg shots no longer stop her. A Flash Grenade kills it outright.
On the way down the stairs a radio call brings 4 more Majini: reload first.