Let's start a topic about our all beloved... no, not really :P
I really don't know, what to think about Gluck. She's one of the most annoying characters in the series.
But then, there a such great scenes that only can be possible with her:
When she's talking and talking and talking and Bigwig tries to ignore her

or:
Hazel: "What's that terrible noise?"
Hannah: "That's the noise of true love!"
Bigwig: "Then remind me to avoid true love!"