Polly (Polydroxol)
"Polly" was the nickname given to Polydroxol captured by the Karflo Corporation. "Polly" was studied by Doctor Trem DeSelvaine, who discovered both its sentience and mimetic capabilities. Polly killed DeSelvaine in an effort to escape captivity.[1]
Sources
"Shape-shifters" – Star Wars Adventure Journal 12 (First mentioned)