@zakuzakuzakuzaku I think she just switched the plates out of spite, Riishu seems to be a little of a handful the attendant could have known about her "preferences" in food and thought it was just her being pick not that it was an allergy that could cause death, i mean look at her expression when Maomao implied that the food could have killed Riishu, she was just a discontent servant.
I loved how her and Jinshi's expressions were reversed. In pages 9-10 Maomao looks almost as sparkly as he is normally, while Jinshi's expressions are exactly same as what Maomao usually wears in his presense XD