Eric is one of The Wonder Vehicles. He is abandoned and doesn't have an owner.
Eric is a green bus, and he is revealed to have releatives.
The yellow bus is his older brother.
The red bus is his older sister.
The red bus is the eldest of her siblings.
The airport bus is his cousin.
She is the same age as red bus.
Also he is the son of Mrs. Driver and Brownie Driver. (Not a deer.)
Eric's age is unknown, but he is not the eldest of his siblings.
Eric sometimes tell lies to Julie the subway, but she showes her honesty to him that teach him about telling the truth.