Sadie
Sadie (voiced by Kate Micucci) – A clerk at the Big Donut, who shares the same shift as Lars. Unlike Lars, she is generally friendly towards Steven and supportive of his adventures. In " Joking Victim",it is known that her favorite food is oyster crackers, and she likes to watch "Canine Court".
In the episode "Joking Victim", it is implied that she has feelings for Lars, and as of "Island Adventure", he seems to reciprocate. In "Island Adventure", Lars kissed Sadie, and she appears to have a crush on him. She is also the first known human to take down a corrupted Gem single-handed, using a fishing spear.
Source: Wikipedia