Clemente Andrea Alborosie (born 21 December 1976) was an Italian Muggle-born wizard and the youngest child of the late Marcello and Isabella Alborosie (née Firelli). He was the younger brother of Paolo Alborosie and was Pietro Maximoff's oldest friend, who was his neighbour in Rocca d'Angelo, their hometown. He attended the New Alexandria School of Enlightenment in Egypt from 1988 to 1995, where he became close friends with Egyptian witch Rawya Zaghloul and Albanian-Italian witch Maria Roxha.
Clemente grew up in a dysfunctional household; his parents argued almost non-stop and his elder brother had run away from home to get away from their home life, so Clemente found solace in Pietro Maximoff, his neighbour whom he always found the time to play with. One day he accidentally performed magic and vanished the door to his room, after which he was told by a member of the Ministry of Magic that he was a wizard. Clemente began attending New Alexandria in 1988 and was surprised to find Pietro Maximoff, his neighbour, also at the school. The two continued their friendship and became lifelong friends, alongside their dormmates Rawya and Maria, the latter of which he had a crush on, but initially didn't reciprocate his feelings.
Clemente was part of the New Alexandrian delegation to Beauxbatons Academy of Magic, where the newly-resurrected Triwizard Tournament was being held. Although he put his name in the Goblet of Fire, Clemente was not chosen to represent the school; the Goblet instead favoured Pietro for the task. During his time at Beauxbatons, he and Maria became close after she broke up with her boyfriend, and although they slept together a few times, they didn't begin openly dating until after the Yule Ball, which prohibited students from the same visiting school from attending together. He attended the Ball with Lyudmila Rusinova, whose advances he rejected in favour of a relationship with Maria.
After graduating from New Alexandria, Clemente was wracked with family tragedy. His mother announced her intention to divorce his father just after his nineteenth birthday, with the latter shortly committing suicide by jumping into traffic and the former being found dead a few days later via mixing alcohol and medication. These events crushed Clemente, but it led him to rebuild his relationship with his brother. He and Maria married in 1997 with Pietro as his best man. The couple later had two children; Alessandro Paolo and Lucrezia Silvana Alborosie. He would later be a groomsman at Pietro's wedding and the godfather of his youngest child, Vittoria Liara Maximoff.