yes, Kyra is Mother Nature basically, not a deity because she's not really immortal because the Vygorns can kill her, more of a spirit. Wolgran is the old "man" who is also a spirit in service of Kyra, he is a custodian.
Hygrons are "Half-spirits" due to their elemental and human part.
Kjugrons are "Guardian-spirits" they protect their elementals and fight along side them. Communication between Hygron and Kjugron is mostly telepathic