Terrias began life as an egg laid by a spoiled servine named Flora who, after the sudden death of her owner, was released into the wild, only for her mate to be killed and to be kidnapped and adopted by a cruel and abusive man named Robert "Bob" Anderson. For several years, his mother attempted to hide the truth of their abusive home from him, as well as hiding him from their owner, and during the years of his captivity, he met another secret child and fellow snivy named Aria, befriending her and later falling in love before mating.