Katrina's brother is a young boy named Alex. He enjoys playing soccer and often practices in the park near their home. Alex is also a fan of video games and likes to spend time with his friends after school. In addition to his hobbies, Alex is a good student who works hard in his classes. He helps Katrina with her homework when she needs assistance. The siblings share a close bond and often play together on weekends, making their time enjoyable and fun.