The relationship between Ansel and Ravenna is perceived as rather subtle by the outside world.
The majority of alchemical tools developed by Ravenna are conceived by Ansel — a fact that remains their greatest secret, known to only a handful within the empire.
Publicly, however, Ravenna is seen as, well… a failure in the eyes of the masses.
Three years ago, rumors were rife that Ravenna Ziegler would become Ansel's pact head, but it ended with Ansel leaving the capital, abandoning her.
This public relationship, if false, indeed indicates Ansel's intention to make Ravenna his pact head, and Ravenna shares this sentiment. But if true, this relationship is more of a cover for their joint research on new alchemical devices.
Therefore, whether it's the servants or the masters in the Hydral Manor, they all recognize this not-so-friendly female scholar.
Pact heads also have some impression of Ravenna, but it's just that —an impression.