Echo

Echo is one of Serena Millicent's three wolves, the other two are Selene and Helios. They were presents from her aunt Anita and cousins, Ruby and Dorothy for her sixteenth birthday.

When Regina and Robin realized what they were, they were both scared and confused at the gift, even though Serena loved her present. Anita assured them that they were docile breeds that would not attack and were very sweet and acted like any normal dog. She later explained that he was a mix of the Snow Wolf and Moonlight Wolf breeds. Anita further explained that he might transform in the middle of the night or he might run out in the middle of the night, searching for snow.

Serena has trained both him and Selene to not transform during the middle of the night, but he and Helios can not be stopped with their middle-of-the-night snow searches. Along with his siblings, he has learned basic things like "Sit", "Roll over", "Lie down," and to not go to the bathroom in the house. But he's also been trained to hunt alongside Serena, her brother and their father, fetch her potion ingredients and to be calm during fireworks on the 4th Of July or gunfire during hunting season.