Starlight is an open concept UTAU which means you can draw her in different outfits and it doesn't matter. Although she does have some designs that are more commonly used, they are not designed to be the only design for any certain voicebank.
The only exception to this rule is the designs that are for specific things, like her Valentine Append and her Blazing Star design.
The only exception to this rule is the designs that are for specific things, like her Valentine Append and her Blazing Star design.