Rina Olewood (IDW Comics)

Rina Olewood is a Magical Girl who can time-travel without changing any of the environment around her. While initially seeming like a good character, she is soon revealed to be the antagonist. She later starred in several spinoffs of the comic.

Kate Cureland
Her greatest friend and ally, being the only person that ever liked her after her father's election for senator. She cares a great for her and feels guilty she has to steal all the magic and get her Grief Seeds due to her fast depletion.