When Angela is looking at her reflection on the lake, her caped wings resemble those of Demona (with solid wings wrapped around shoulders with horns on shoulders, fingertips on wings). Later in the episode, her caped wings resemble those of Goliath, bat-like with a single finger and draped over the shoulders.
Elisa: So that's it. An underground elevator. But who pushed the "down" button?
Goliath: Somebody who knows we're here.
Sevarius: Amazing deduction, Goliath. I see Gargoyle grey matter is as razor-sharp as ever.
Angela: (to "Nessie") I'm... Angela. If I look a little nervous, it's because I've never been this close to a real live Loch Ness Monster before. But I'll wager you've never been this close to a real live Gargoyle, either. Guess that kinda makes us even.
Sevarius: You're not only a member of Goliath's clan... he's your biological father!
Angela: Goliath... is my father?
Elisa: Sevarius! Your idea of fun would give Dr. Frankenstein nightmares!
Sevarius: That's Doctor Sevarius to you.
Sevarius: (to Angela) Well, I see you inherited papa's short fuse.