And so! After killing Clown Lloyds, Lady Sashas, Mighty Victor (easier to find now because less people camping in Annex and killing them unknowingly), and Octopus for the fourth time... I beat up Cathy and need to beat her up two more times to get Brandish Arm.
The quest is called "Scold Catherine".
I originally set up Torsche, Musk, and Cathy INT, but you can't enter Catherine's room with any Catherines. So I had to change it to Ania, Musk, and Emi. I put my armors and weapons on them, except for the blunts which were not so great mod 92e Barons. I was worried they wouldn't make it. I used pink loli and mystic potion (used up the Princ potions during the map quest portion, Emi does not have ET). They didn't make a dent on Cathy for the first fifteen seconds, but in the end, I managed to finish in a minute and a half. *phew!*
For Cathy INT's Activator you have to answer five questions correct for three days. If you answer any of the five questions wrong at any time you have to start over again. I wrote down the answers to some of the questions, but I didn't write down the questions. I made some guesses to what those questions might have been.
/edit Ash posted Questions & Answers here.
Red (Ludin's eye color)
Robo R 90 (Viki's toy)
Grandies (her name)
Ernesto (Viki's last name)
30 seconds (Thunder skill)
5 people (Raven getting rejected)