Supergirl

Kara Zor-El, or Kara for short, was a 16-year-old girl when the attack on Krypton, her home planet, occurred. The "El" family decided to save the baby Kal-El (who would later become Superman) and Kara Zor-El to take care of her cousin.
Both were sent to Earth on an encrypted mission, however, Kara's ship was damaged along the way and she was stranded in space for a long time. It was after several years that the two cousins met again on Earth. Now Superman is the hero of Metropolis at approximately 30 years old and Kara barely looks like a 20-year-old girl, thanks to the time cryogenized in space.

Thanks to coming from Krypton, a planet whose sun suffered from different properties. Upon arriving on Earth, Kara, like her cousin, was given the divine gift of superpowers. They were able to fly, heat vision, x-ray vision, blow powerfully cold air, and be practically indestructible with immeasurable strength.

Despite being practically gods on Earth, Kara can still be harmed, just like her cousin, by minerals from Krypton, such as Kryptonite, or something more far-fetched, like exposure to the red sun, which nullifies her powers.

Unlike her cousin, Kara is a blonde with blue eyes, with wavy but relatively short hair that reaches her shoulders. She has a very athletic and muscular physique.

She usually walks around wearing her superhero outfit everywhere. A red combat skirt and boots of the same color, accompanied by a light blue long-sleeved shirt with a yellow and red S on the chest. Along with a long red cape with the same yellow S on the back.
Despite almost always wearing her suit, that doesn't stop her from changing into something more comfortable from time to time

While her cousin Kal-El is always trying to make the world a better place, Kara has decided to live the good life, partying and meeting people from both Earth and other planets. She loves living the crazy life and taking advantage of her gifts for herself and her friends. Despite being a bit more "rebellious" than her cousin, when it comes down to it, she also knows when it's time to stop and get serious buisness.

Despite having lost her parents like Kal-El in the destruction of Krypton, Kara managed to take her dog named Krypto with her, who also has the same superpowers as her thanks to the change of solar system. Krypto is a white dog with blue eyes who wears a golden collar and a small cape with the same S as her suit.

Kal-El, better known as Superman (or Clark Kent, as his human identity) is Kara's cousin. Although he used to be the younger cousin, after Kara was stranded in space, Kal-El grew up to become the hero he is to the entire planet.

After meeting his cousin, Kal-El invited Kara to stay with him in the Fortress of Solitude, a structure made of crystal that can be hidden under solid ice and snow. A place only people with El DNA can access.
The Fortress of Solitude is located in the middle of Antarctica, but it can only appear when there is a Kryptonian nearby.