Itako is a nickname for the female version of Italy, derive from Itaria and the suffix "-ko". Though fans in the Western fandom tend to use the names Felicia or Felice for her, the Japanese fandom has given her the name Daisy Vargas. This name had fallen out of use shortly after Himaruya brought up the suggested name Alice. Alternatively, in a straighter "genderbend" take, Daisy is sometimes used as her middle name, with Feliciana being the first name.
In their appearance in Volume 4, she'd commented that there was nothing wrong with falling asleep, even during a meeting, and that it was a quite natural thing to do, before flustering Estonia by suggesting that they go out to eat and "sleep properly" once the meeting was through.