Any others would have felt pressure at the inflection of his tone, a pressure to impress him or otherwise prove their worth. Diana had long since outgrown that simplistic urge; if Bruce was indeed ever impressed at anything she'd accomplished, he'd kept it to himself.
"Tsepish, also called the Mad Monk. He and his sister, Dala...they had been transformed by a ritual, if I recall correctly." Her eyes shifted to the vial a moment, then back to the screen. "A voodoo ritual specifically, performed in Louisiana, before the Civil War. But these bodies didn't make any transformations. So I would think either test subjects," she finished, glancing at Batman, "or food."