[Kaoru understands that the balance between too plain and too outlandish is a hard one to strike, especially after the last trial...]

Miss Siren and Miss Belarus are the least imposing physically-speaking, but Miss Siren is one of the most powerful contenders by way of her abilities. Mr. Altman would reasonably be the least harmful... Still, Miss Siren is in a very opportune location for carrying this out. I do not know if Mr. Strider was acquainted with any of the rest.