Feeder

A human who willingly donates blood to a Moroi. Feeders usually become addicted to the drug-like endorphins in a vampire’s saliva, which give intense pleasure when bitten.

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Known Moroi Feeders
Alice (in Shadow Kiss)
Dorothy (in Bloodlines Series)

Strigoi Forced Feedings in Frostbite
When Rosemarie Hathaway, Mason Ashford, Eddie Castile, Mia Rinaldi, and Christian Ozera were captured and held captive によって Strigoi Isaiah and Elena, Isaiah would stop によって every so often and take a drink from Eddie. Eddie was left scarred によって the incident and blames himself for everything.
Strigoi Forced Feedings in Shadow Kiss
When St. Vladimir's Academy was attacked によって Strigoi, some Moroi and Dhampirs were taken captive. While they were in a cave about five miles from the school, the Strigoi used some of the people as feeders.
Strigoi Not-So-Forced Feedings in Blood Promise
When Rosemarie Hathaway was searching for lover and awakened boyfriend, Dimitri Belikov, in Russia, he captured her and held her captive. While he did, he was feed from her every so often to keep her reasonable side muddled in bliss so there was no way she could plan escape.