Isabella Yang (Japanese: イザベラ・ヤン, Izabera Yan) is the fiancée of Jean-Jacques Leroy and a member of the JJ Girls fan club.
Isabella has neck-length hair with a single strand usually hanging in her face, grey-blue eyes, thin eyebrows, long eyelashes, and red lipstick. She wears a necklace with JJ's initials on a pendant.
Isabella is hugely supportive of JJ and sings along with his short program song to give JJ encouragement during his short program at the Barcelona Grand Prix Final. Later on, after JJ's scores are announced, she remains strong in her support of him, starting a chant in the arena to cheer JJ up after receiving a low score.
Isabella is JJ's fiancée and a dedicated member of his fan club. The two are often seen close together. JJ declares that he would be the one who would win gold in the GPF and get married instead of Yuuri. Isabella believes that JJ can win gold in all his skating events. When JJ flunks his GPF short program due to anxiety (some from these expectations), Isabella still cheers for him through tears. She starts a "JJ" chant in the audience after he enters the kiss and cry.
- She can be seen with JJ in the background of one of the photos from last year's GPF banquet.