
Another Enemy signature Weakness. Looking at the two elements, the effect and the discard condition, we get:
The effect: Enemy Weaknesses tend to be on the weak side, but this one is tailored to mess with Rita, since it gets an attack whether an Evade attempt succeeds or fails. There are weapons that do +1 damage (Like Fire Axe or the .18 Derringer), but that's still 2 actions to clear. The Ornate Bow is a very good choice, giving Rita a 7 vs 3 Fight for 3 damage, but Rita could really use her hands for clue tech and other things. Brute Force is another choice if you can boost her combat a bit to get a 2 up result. Like all enemies, of course, there is no reason another investigator can take them off her hands if that's not too much tempo loss for the team.
The discard condition: Kill them or get a friend to take a hit and Banish them to the far side of a large map or maybe get Handcuffs on them, but killing is the best choice.
Taking it all into account, this is an average signature Weakness, a bit more trouble than some of the other Enemy Weaknesses.