J.T. Forbes is a long-time friend of Vincent Keller. He is also a scientist and helped Vincent over the years as he tried to restrain his beast powers and discover a cure. He's sarcastic, and funny, but would do anything to help those he holds dear. 

J.T. Forbes Quotes

Tess: It's just, I dread this holiday so much. It's the part where my family grills me about my single status and there are no gifts to offset the humiliation.
J.T.: Then don't go. Tell them you're working, which you are. We can boycott the holidays together.
Tess: Just you and me?
J.T.: And some beer and some pizza and some creepy guy's voice.
Tess: Can we start drinking now?
J.T.: Absolutely. This is going to be the best Thanksgiving ever! Non-Thanksgiving.

Cat: Have you heard from Vincent yet?
J.T.: I'll just leave the damned door open from now on.

Beauty and the Beast Quotes

Cat: Vincent last night was...
Vincent: Incredible.
Cat: No, I was going to say a mistake.

Cat: I cannot justify going for tea with my mom's sisters when somebodies hunting Vincent.
Tess: They're not hunting Vincent, they're hunting beasts. They don't even know that he is one.