Callie is one of the former Squid Sister hosts from Inkopolis News program which announces events, Splatfests, new DLCs and other battle-related news. She used to host with Marie and manage Splatfests. As well as this, she is a member of the famous duo the Squid Sisters, a singing duo in Inkopolis. In Hero Mode, it is revealed that the she's Cap'n Cuttlefish's granddaughter. Callie is also known as "Agent 1" of the new Squidbeak Splatoon. Despite their title being "Squid Sisters", Callie and Marie are actually cousins.