Wilson Fisk: We all knew, that we would need to eliminate the Russians one day. They were too unpredictable.
Leland Owlsley: This from a guy, taking heads off with a car door. (00:11:20)
Leland Owlsley: What? I'm going against the three of you? I like my head where it's at. (00:12:26)
Vanessa Marianna: I know you're a dangerous man. That's why I brought a gun... to a dinner date.
Wilson Fisk: Would you like to leave?
Vanessa Marianna: No... I'd like a reason to stay.
Wilson Fisk: [Long pause] I've done things that I'm not proud of, Vanessa... I've hurt people, and I'm going to hurt more. It's impossible to avoid for what I'm trying to do. But I take no pleasure in it... in cruelty. But this city isn't a caterpillar. It doesn't spin a cocoon and wake up a butterfly. A city crumbles... and fades. It needs to die before it can be reborn.
Vanessa Marianna: So I don't need the gun?
Wilson Fisk: No, by my side... is the safest place you could ever be. (00:42:14 - 00:43:33)
Chosen answer: After some research, I can say that no, Cass is not a character of Marvel, nor is he present in the Netflix show. As far as I can tell, it's either a real person, or a random name chosen for the coffin, most likely the former. In another season of Daredevil, the show utilized a real cemetery displaying real names in the tombstones.