There we are: Orion pretends to have an answer for everything by being a smartass and not fully grasping the fact that the woman he is talking to is the heiress of a Faunus exploiting company and bears a general distaste towards his entire species.

Also, because it's likely something that Arara would at least be able to access later: Mrs Armstrong is a Mid-high tier Huntress with no known biological children and no known spouse. Orion would likely be mentioned briefly, but his Faunus heritage would be unlikely to appear in any newspaper articles due to his lack of advertisement of the fact. The 'Armstrong household' would basically consist only of Orion and his adoptive parent, who owns a reasonable wealth and standard of living.