Isabella Yang (Japanese: イザベラ・ヤン, Izabera Yan) is Jean-Jacques Leroy's fiancée and a member of his fan club, JJ Girls.
Not much is known about Isabella, except that JJ proposed to her with the condition that they get married after he won the World Championship.
Isabella has dark, medium-length hair, with a single strand usually hanging in her face. She has grey-blue eyes, thin eyebrows, long eyelashes, and is always seen wearing 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.