Nila Devi
Niladevi appears in the "Vaikhanasa Agama text . " Some texts mention that Vishnu's "Iccha shakti" takes three forms: Shridevi , Bhudevi and Niladevi , representing the three "guna"s; Niladevi is associated with "tamas . " The "Sita Upanishad" mentions that these three forms as those of goddess Sita; Niladevi besides tamas , is associated with the sun , the moon and fire . "" She appears as Krishna's gopi in Cherusseri Namboothiri's "Krishnagatha . " 
<triplet> tamas <subj> "guna"s <obj> instance of <triplet> Krishnagatha <subj> Cherusseri Namboothiri <obj> author