Thread:B214/@comment-24421137-20170616222545/@comment-30924344-20170617102753

Well she certainly has a higher position as a maid that's for sure. Maybe not Head Maid but she is the only confirmed to have a higher maid position.

Volume 5 Chapter 1. Maids respond to Grayfia's beckoning [make a gesture with the hand, arm, or head to encourage or instruct someone to approach or follow.]

“Ojou-sama, I’d like to show everyone to their rooms at once.”

Quote right here: Grayfia-san raised her hand and some maids gathered with us. The maids were all beautiful women! Was this part of the service!?

“You’re right, I have to go greet mother and father after coming home as well.”

Her clear action of summoning other maids who responded to her which means they obeyed her instruction to come to her, added by the fact she was the maid who led the Gremory group around gives meaning to the phrase "Action speaks louder than words". Another maid, would not do what another maid says unless the other maid had a higher position.