Kseniya has been the narrator's best friend for 4 years since they met in school. She introduced the narrator to basketball and volleyball, encouraging her to join the school basketball team. While the narrator was not initially skilled, Kseniya's encouragement helped her improve. They spent their summers practicing volleyball daily, allowing the narrator to develop her skills and meet other players. Kseniya has supported the narrator's involvement in sports, helping her find success and enjoyment through athletic activities.