User blog comment:Maki Kuronami/Volume 2 Speculation: New characters/@comment-3387274-20140522202348/@comment-186.188.108.69-20140522221026

Or maybe an Anti-White Fang soldier. Think about it: She instantly knew that Blake was a Faunus and when Penny entered "Combat Mode", she only attacked the White Fang, even though there was one human working with them. The reason why she didn't fough Blake or Sun was because the White Fang mooks were the only danger in her opinion.

NOTE: I don't believe Penny is a robot either, but perhaps she was subjected to some sort of conditioning, which would also explain why she's so socially ankward.

HSXI- May the Power protect you.