A Cursor roster is a list of agents with jobs. The picture next to each name is just a still image. An avatar pack gives you those stills in one style, so the engineer and the chief of staff look like they belong on the same team.
Browse the packs on the homepage and switch styles in the agent UI sample. The sample uses the same roles people actually run: chief of staff, executive assistant, engineer, designer, and marketing.
What you assign
After checkout you download a ZIP from your account. Unzip it and use one image as each agent’s picture in the UI you already use. The pack does not install a Cursor plugin and it does not change how the agent works.