Here I have all the characters for the first series. There's a second series but I don't know of anyone new yet. Here are all the regular season 1 characters.

Sakura Avalon
Tori Avalon
Aiden Avalon
Natasha Avalon
Li Showron
Keroberos/Kero
Madison Taylor
Meilin Rae
Mackenzie
Julian Star
Yue (Total Spoiler...)
Ruby/Ruby Moon
Eli Moon
Spinner/Spinner Sun
Mr. Terrada
Rita
Chelsea
Zachary
Nikki

Clow Reed