Supergirl has powers that are similar to Superman's (flight, superhuman strength and speed, invulnerability, heat vision, super hearing, x-ray vision, telescopic and microscopic vision, and super breath) and she shared his vulnerability to Kryptonite. She was also weakened by red sun radiation and presumably has the same problems with magic. Because Supergirl was much younger than Superman, her power is not yet equal to her cousin's, though on her 21st birthday, it was evidenced how much her power has grown, as her strength seemed to be near his. She was cocky, hip, and very independent; though these traits often hindered her in her early career, she has also found ways to use them to her advantage. She also had over time, obtained hand-to-hand combat skills.