Question: are luka and juleka siblings?
Answer: Luka Couffaine is a character who appears in the second season of Miraculous: Tales of Ladybug & Cat Noir. He is the older brother of Juleka Couffaine, the guitarist of Kitty Section, and a new student at Collège Françoise Dupont, who attracts the attention of Marinette Dupain-Cheng.