[Felicia notices that, and gives Sasha her most reassuring smile (although now reassuring it can be on a face like hers is questionable)]
Oh, don't be frightened—they're quite harmless. [actually they look like they could do some serious damage, but shhh.] They're not so unusual, where I come from.
[she lowers her two visible mechadendrites so that they're below table-level and not quite so obvious, though]