JeremiexYumi

Polymorphic clone of Yumi attempts to seduce Jeremie.

Jeremie and Yumi have a very close relationship in the Code Lyoko canon. With Jeremie accepted as the genius of the group, and Yumi the "responsible one," there are fans who favor a romantic relationship between them.

Yumi chats with Jeremie.

As far as the canon goes, Yumi and Jeremie's relationship rarely surpasses that of platonic friends, not unlike siblings. They often confide their personal problems in each other, particularly those involving their other friends. The only instances of a romantic advance between them occur in the episode Image Problem. XANA tries using a polymorphic clone of Yumi to seduce Jeremie so that he will go with her to the factory. In the end of the episode, Yumi teases Jeremie by flirting with him in the same fashion, but is quickly stopped by Ulrich.