Guardian

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"Senka's specially trained agents are called Guardians. She assigned her very best Guardian to keep track of me—and apparently you."

―Tatiana to Chris^[src]

"I answer to Senka. Among the Coven there is a group of us who are carefully selected, heavily trained, and highly trusted."

―Hand of the Queen

Guardians are Darkkin who are specially trained agents of Senka.