Cer is another daughter of Nyx, the goddess of night. Cer is the goddess of Violent Death, as nearly all of the negative-dutied goddesses come from Nyx. Her other well-known sisters are Achlys and Hemera.
Cer is violent and tries hard to look for a worthy death to watch.
Cer's real name is Ceridwan.
Cer's Roman name is Keres.
Cer's official Greek name is Κηρ.