Personal
- Son of Rasa Vaičiulytė and Dainius Buika
- Has two sisters: Saulė and Ramunė
- Enjoys playing chess, video games and reading
- Speaks English, German and Lithuanian
Before BYU
- Spent 2025-26 season with Jonava Hipocredit of Lithuanian Basketball League
- Appread in 21 games, averaging 3.4 points, 1.8 rebounds and 1.5 assists per game
- Made professional debut with Zalgiris Kaunas in 2024-25
- Also appeared in EuroLeague game against ALBA Berlin
- Led Zalgiris to NextGen EuroLeague title in 2025
- Named to All-Tournament Team after averaging 20.2 points, 5.2 rebounds, 4.2 assists and 1.8 steals per game in group play
- FIBA U16 EuroBasket Champion
- Also represented Lithuania at U17 FIBA World Cup
- Averaged 4.8 assists per game, fourth-most at tournament