The newly dubbed "Tremor" was a failure, as his free will and disgust for what he had become overwhelmed any type of loyalty he had for the mafia. As a result, Twist killed the rest of Tremor's family except for his brother David.
The story describes the downfall of Tremor, who is now known as "Tremor," due to his internal conflict between his former self and his current state. Twist's actions are a consequence of this struggle.