[...Oh. Really, she is inclined to treat royalty differently (not that meeting royalty is a common thing for). Out of self-preservation rather than actually thinking them different from others. She's visibly surprised, but bites back any comment or title she might have wanted to go for.]
...Well. [A giant talking mouse being royalty isn't that much more unbelievable than a giant talking mouse existing in the first place. Softly:] I guess few people choose their position in life.
[It's not so strange to think even someone as privileged as royalty would be unhappy with the treatment they receive.]