The former girlfriend of Dr. McNinja.  Smart and deadly, but also treacherous. She is a member of American Ninja Guild.

Hortense gets along very well with the rest of the McNinja clan, and Mitzi McNinja even says that she is like the daughter she never had. She spends most of the time in The Adventures of Dr. McNinja as an Antagonist as she is against the goals the the protagonist, but not as a villain.

She is seen in the ending going to the McNinja's house for Katanakka. She actual is the primary focus of the epilogue, along with Patrick Goodrich.