Cynthia Addai-Robinson

The Vampire Diaries' Bonnie Bennett is getting a new mentor — hopefully with better intentions than her last one.

The Vampire Diaries' Joseph Morgan on the fallout of forcing Tyler out and Katherine's return

Spartacus: War of the Damned actress Cynthia Addai-Robinson will play Aja, a powerful witch, with a connection to Bonnie's mother, who comes to Mystic Falls to help Bonnie control her magic. Seeing as Jeremy is (most likely) dead, does this mean that the only other person with the ability to guide Bonnie with her magic, Professor Shane, is also about to croak?

The Vampire Diaries: Who died, who left town and who returned?

Addai-Robinson will appear in the March 21 episode.

Additional reporting by Natalie Abrams