She worked for Kraznys befored and that gave some hilairous situations when she had to change his words all the time. She seems very loyal to Dany now and I think she will return later in the series. Seems like a nice girl.
"as Missandei. Dany's new handmaiden, Missandei was a slave and interpreter, and entertainingly translated the Slaver's Bay leader's foul language into more suitable words. Now she is a loyal friend and handmaiden to Dany.