Jeremie Belpois (also spelled Jeremy Belpois or with an accented spelling Jérémie Belpois, pronounced as "Jerr-mee Bell-Pwah") is one of the main protagonists of Code Lyoko, a student at Kadic Academy, and the unofficial founder and leader of the Lyoko Warriors. He is Aelita's love interest.

Despite his young age, Jeremie is a scientific genius, possessing a gifted and talented mind far beyond his years. He acts as the group's guide and programmer for Lyoko since he is the only one that is capable of operating (or even understanding) the complex nature of the Supercomputer (other than Aelita, who starts to share his role in later seasons).

It was Jeremie's discovery of the Supercomputer that commenced the group's adventures into the world of Lyoko and their fight against the power of X.A.N.A.

Jeremie is responsible, resourceful, and endlessly motivated. His dedication to his work is driven by his devotion to his friends and to protecting the world from X.A.N.A.'s threats, and he is willing to take great risks in order to further his goals. Jeremie's confidence is a key part of the team's framework, and his ability to reassure his friends has gotten them through some of their darkest hours.