Zaya is a really tall robot that seems to be found in Russia years before the Mu'zuko attacked Earth. He was the first robot to be found and actually is alive like he has his own feelings. However, Zaya has no emotions, nor can he feel anything. No pain. No touch. Nothing. As if his body was numb. Zaya seems to be less trusting and not caring about others around him, as like he doesn't like being alive. Now, he is a bit of a jerk. Likes to annoy people, send them curse memes, and piss a few off. Besides his behavior. This robot seems to be distant when it comes to himself, he refuses to talk about his life or where he came from, sometimes a few wonder how his "family" can tolerate him. Though, even though he jokes about things, he is hiding something. Something he refuses to let anyone know. Only time will tell.

Zaya voice has a Russian accent baritone tone!

A little story about Zaya:
Zaya was first found in the 1800s, nobody knows where he came from or what he is. Some say he was created to end humanity, some say the governor was secret making a powerful solution. Though no one can really say it was all true. This 12'4 ft tall robot was found in a forest by a few travelers. Zaya was just minding his own business. Sitting down and enjoying nature, which the travelers have never seen something like this. Let alone, something alive and this tall.
They convinced him to head back to the laboratory. They want to know about this robot and where he came from. 
They couldn't find anything about this robot. But they however do know that his body wasn't normal mental or steel. No, it was Instructable. Impossible to damage or let alone leave a scratch. However, that was something more powerful and serious about him. So. The travelers/scientists decided to keep him hidden. 

They also give him the name. Zaya.