However, there are several characters who have served as close allies and partners to Captain America throughout his history:
* Bucky Barnes: Originally Captain America's best friend and fellow soldier, Bucky was presumed dead for decades before returning as the Winter Soldier, brainwashed and used as a weapon. Despite this, he eventually rejoined Captain America as a crucial ally and, for a time, even took on the Captain America mantle himself.
* Falcon: Sam Wilson is a skilled fighter and former Air Force Pararescue Jumper who became Captain America's partner and friend. He even inherited the mantle of Captain America after Steve Rogers retired.
* Black Widow: Though more of a fellow Avenger than a sidekick, Black Widow has worked closely with Captain America on numerous missions and developed a strong bond with him.
* Sharon Carter: Steve Rogers' niece and an agent of SHIELD, Sharon Carter has often served as a close confidante and ally to Captain America, even romantically involved with him at times.
So, while Captain America doesn't have a singular sidekick, these characters have all played significant roles as his allies and partners.