Ahsoka is picking up right where the beloved animated show Star Wars: Rebels left off. While audiences may not have had to have seen Rebels in order to enjoy Ahsoka, it may certainly help. Characters like Chopper, Sabine, and Hera all appeared first in Rebels as members of the crew of the Ghost. Along with them was Ezra Bridger, Zeb Orrelios and the Jedi Knight Kanan Jarrus. While each person played an important role, Kanan stood out and stood above all others.
Source：https://www.cbr.com/ahsoka-kanan-jarrus-explained/
