Honestly the best way to do the Missing Partner quest is with the killzone strat someone posted here ages ago
Lona takes a big steel shield, she stands in front of the doorway one space away, greyrat on the left, cecily on the right. Enemies come in, they get stabbed to death while trying to attack or rape lona. If they turn their attention to cecily, you can hit them yourself. Every enemie dies in less than 5 seconds, every figth completely safe.
If your weak/sexy is high enough you don't even need a shield since the enemy will be too busy trying to grope you to attack.