¿Who is stronger, Winter Soldier or Supergirl?

Winter Soldier, also known as James Buchanan "Bucky" Barnes, is a Marvel Comics superhero who was first introduced in Captain America #1 in 1941. He was created by Joe Simon and Jack Kirby. Bucky was originally portrayed as Captain America's teenage sidekick, serving as his partner in the fight against the Axis Powers during World War II. However, in a tragic turn of events, Bucky was presumed dead after a mission gone wrong, leading to Captain America being frozen in ice and preserved for several decades. Decades later, Bucky was revealed to have survived the mission and had been brainwashed by the Soviet Union to become a deadly assassin known as the Winter Soldier. He possesses superhuman strength, agility, and endurance, as well as extensive combat training and knowledge of espionage. The Winter Soldier's most notable power is his bionic left arm, which is capable of crushing metal and firing energy blasts. The arm is also equipped with various gadgets and weapons, including a retractable knife and a grappling hook. Despite being brainwashed for years, Bucky eventually regained his memories and went on to become a hero in his own right, even taking up the mantle of Captain America for a time. Throughout his history, the Winter Soldier has faced off against numerous foes, including Captain America himself, who was initially suspicious of Bucky's motives after he resurfaced as the Winter Soldier. However, Bucky has proven himself time and time again as a valuable ally and hero, using his formidable skills and determination to protect the world from threats both foreign and domestic. The Winter Soldier has also made multiple appearances in the Marvel Cinematic Universe, portrayed by actor Sebastian Stan. He remains a popular and iconic character in the Marvel Universe, known for his strength, cunning, and unwavering loyalty to those he considers family.

Supergirl is a powerful superheroine hailing from the planet Krypton. She is the cousin of Superman and shares many of his superhuman abilities, including super strength, super speed, and the ability to fly. Supergirl's real name is Kara Zor-El, and she was sent to Earth as a teenager by her parents just before the destruction of Krypton. Like Superman, Kara was raised by adoptive human parents and learned to hide her powers for fear of being discovered. However, she eventually decided to embrace her true identity and use her powers for good, becoming the superheroine known as Supergirl. In addition to her physical abilities, Supergirl also possesses a range of other powers, including heat vision, super breath, and enhanced senses. She is also highly intelligent and skilled in a variety of fields, including science and technology. As Supergirl, Kara fights to protect Earth and its inhabitants from a variety of threats, including supervillains, alien invaders, and natural disasters. She is a member of the Justice League and often teams up with her cousin Superman and other superheroes to defeat their enemies and save the world. Despite her incredible strength and abilities, Supergirl is still a young woman learning to navigate the complexities of life and find her place in the world. She struggles with her identity as both a superhero and a human being, and strives to balance her duties as a hero with her personal life and relationships. Overall, Supergirl is a strong, courageous, and compassionate hero who uses her powers to make a positive difference in the world.