What I've seen of Duck so far has been pretty true to her canon as far as I can tell! I really liked her text thread with Vanitas where she suggested Karkat had to wake up with a kiss.

A thing about your HMD post, though! Anonymous is disabled on your account and if you're not sure how to track IP addresses, it's probably enabled since that's the default. You can fix both by going to Account Settings --> Privacy, then choose "everybody" next to Enable Comments and "nobody" next to IP Address Logging.