Naga

A Naga (or Nāga) is a giant magically-endowed cobra-like shapeshifters. One of them appears in "Ghoul Goblin".

Description
Nagas are very ancient beings and consider human beings as not very important. When not in the form of a giant king cobra, they can assume human form. Though they are strictly bound to neutrality, they can act to restore equilibrium.

"Day One"
In "Day One", Airavata lets herself to be evoked by Harry Dresden, but provides him with more warning than help.