Luca is a tall, slender, and attractive teenager with fair skin. He has a Roman nose, pale pink lips, light blue eyes, and medium-length black hair with turquoise-colored tips. Unlike his sister, Juleka, Luca is more playful, charming, and flirtatious. He reads people's emotions and expresses them through music using a guitar. He is very kind and generous, especially towards his friends and family, but also towards people he has just met, as when he encourages Marinette after an unexpected encounter with her. Like Adrien, he also supports others, such as his sister Juleka. Adrien himself describes him as a brave, caring, and determined person.

Juleka Kuffen (twin sister) Anarka Kuffen (mother) Juggad Stone (father)

His clothing includes a white T-shirt with a black Jagger Stone print and black jeans that are torn at the knees. He also wears yellow, orange, and brown leather bracelets, and his nails are painted black. He is wearing a sky blue jacket with a dark blue hoodie and black high top converse with multicolored dots. He has a black ring with silver border on his left index finger and black headphones. Luca is the twin brother of Juleka, with whom he is very close. They are in the same band, The Kitten Gang, where they play the same instruments. He also goes to the movies with her friends. When Yuleka openly tells him about her dreams of becoming a model, Luka listens to her and advises her not to be afraid when she also talks about her desire to model Marinette's designs. Luka treats her feelings with great understanding, but at the same time, he encourages her to ask Marinette to be her model. As a person,

Luka is an excellent guitarist and musician. He is particularly skilled in creating melodies through people's emotions. According to Luka, he has been playing the guitar since childhood.