Helena is given an expertise in the martial art of Kenpo which she displays in multiple episodes throughout Seasons 2 and 3. She is also shown to be an accomplished author and inventor. Two of her many inventions are the Imperceptor Vest (allows faster-than-humanly-detectable movement) and Cavorite (a fictitious metal with anti-gravity effects, as described in the real H.G. Wells story The First Men in the Moon) – both of which are depicted in "Time Will Tell". Another invention displayed in the show is a grappler gun, shown in episodes " For the Team ", "Buried" and " The 40th Floor "; and the time machine as seen in " Where and When ", which allows the transference of consciousness to the minds of targeted individuals at a specific date and time. It is implied the character has a fluency in languages as she depicts a fluent grasp of French and a recognition of Demotic Egyptian upon hearing it spoken per "Buried". In the same episode, Wells says she "considers the study of dead languages to be a hobby".