Infected Female

Former personnel of the base, those poor souls are now mindlessly shambling around in infected rooms... until they notice a fresh victim to spread the infestation further.

Tactics
Infected female has no damage-dealing normal attacks, but has a chance to turn towards you; Guarding when she does that saves you, otherwise she grabs your face and starts smothering you, causing physical damage every turn. If you wear any face-covering clothes, this attack can't land. The context menu provides option to molest her, but it doesn't do anything: like all infected and meat parasites, she's immune to lust.

If neither of you manages to win the fight within 20 turns, she'd shamble off, ending the battle. This spares you the pain of fighting her if you can't quickly chew through her 90 stamina, and prevents the softlock if you click "surrender" while having your face covered (as she can't cause you any damage that way), or have lust-based weapons equipped (which is generally a terrible idea against any meat parasites).

Being infected with meat parasite, she's very vulnerable to Electric Shock; it lowers her defence by 10% instead of normal 1-3%, and guaranteed stun.

Post-battle scene
Defeat scenes:
 * After defeating Lust Doll in combat, she would infect them with a crotch parasite.
 * If Lust is already infected with a crotch parasite, they would just pass out.
 * Being defeated by any infected while already having both chest and crotch parasites would result in brain infestation and abrupt Bad End.