Of course. It's a matter of configuring your K2 category settings. Or use K2 template overrides (info here getk2.org/documentation/tutorials/174-templating-with-k2-and-the-concepts-of-sub-templates) to fetch a single extra field anywhere you want using this guide: getk2.org/documentation/tips-a-tricks/2667-display-single-extra-fields-anywhere-in-your-k2-content