Karalo Hepoiteloto Maibuca Junior (born in 1999) is a Tuvaluan sprinter. He is the son of Ratu Karalo Maibuca Senior, a Fijian, and a mother from Kioa. He was selected to compete at the 2020 Summer Olympics and was given the honour of being the flag bearer for his nation in the opening ceremony alongside Matie Stanley. In the preliminary round of the 100 metres he ran a Tuvaluan national record time of 11.42 seconds, but did not qualify to the next round. Maibuca represented Tuvalu in the 2023 Pacific Games. He will represent Tuvalu at the 2024 Olympic Games in Paris.