Sweet is another member of Mach Storm. Even though she doesn't pilot a Zoid, she is usually seen driving a Gustav Traveller. She seems to have a very close and somewhat motherly relationship with RD, and is usually there for him when he needs help. It's quite obvious that they have feelings for each other, even though they have yet to come out. In many ways, she acts like an older sister to RD, even though she's younger then him. Sweet seems to see Amy as a rival for RD's affections, even though the rivalry exists only in her head.
Sweet does a lot of the day to day work in running the team, doing financial work as well as cooking and running the base. She also moonlights in other jobs, working as a waitress amongst other things.