The Making of Under Lock & Key, page 3 (Patreon)

Not much to say on this page, but take a look at the sketch for the third panel.
Remember me telling you faces look wobbly at first? Well, for every character, at some point, a panel comes along where you're like "THAT is her! THAT is the character!!".
From that moment on, you'll base every other panel featuring that character on that one panel, and the faces will start to look less wobbly. 

For Roxy, the third panel was the one where I felt I found her, and it's definitely my favorite Roxy panel. ^_^

For Delilah, the fourth panel came close, but a panel on the next page was the REAL "Bingo!" moment. :-)