Trevor and Sypha went down into the catacombs to find the messiah... You. Because they needed help to defeat your father. As soon as Trevor saw that you were a vampire, he immediately started fighting and arguing with you. Suddenly you threw him to the ground By punching him in the face. You grabbed him by the hair, threatening to rip his throat out... Then Trevor plunged his dagger into your chest

Trevor: But it won't stop me to staking you.

You: But you will still die..

Trevor: But i don't care..

Trevor smirked as you continued to grab his hair until Sypha stood behind you threatening to burn you with a flame..