Admiral Thrawn was created by Timothy Zahn for the now non-canon Star Wars book trilogy 'Heir to the Empire.'
Numa has "Boil" written on her armor in Aurebesh, or, more commonly, Star Wars language. This is a reference to the Clone Trooper, Boil, who rescued her as a child in Star Wars the Clone Wars episode "Innocents of Ryloth"
Hera refers to the Imperials as 'Gutkurrs' - the name of hard shelled creatures native to Ryloth that were seen in Innocents of Ryloth (2009).