Bulk Biceps is a white pegasus pony with a blonde mane. He is easily distinguished by his thick musculature, tiny wings and generally loud and enthusiastic demeanor. In spite of his somewhat intimidating appearance, some more sensitive aspects of his personality seep through on occasion. In the episodes "Hurricane Fluttershy", "Wonderbolts Academy" and "Equestria Games", his emphatic "YEAH"'s are provided by the show's supervising director Jayson Thiessen. In his full-fledged speaking appearances in "Rainbow Falls" and "Castle Sweet Castle", he is voiced by Michael Dobson.