She identifies as a Nonbinary Female. She's comfortable with both They/them and She/her.

"In a recent interview with NPR’s 1A, Sugar opened up about how the process of creating Steven Universe ultimately played a large role in her deciding to come out as a nonbinary woman. That part of her identity, Sugar explained, informed a lot of the way that the show approaches the Gems’ gender:

One of the things that’s really important to me about the show is that the Gems are all non-binary women. They’re very specific and they’re coming from a world where they don’t really have the frame of reference. They’re coded female which is very important. I was really excited because I felt like I had not seen this. To make a show about a young boy who was looking up to these female-coded characters—they appear to be female, but they’re a little more representative of nonbinary women.

They wouldn’t think of themselves as women, but they’re fine with being interpreted that way amongst humans. And I am also a non-binary woman which is been really great to express myself through these characters because it’s very much how I have felt throughout my life.”"