According to a Parade.com interview, August 5, 2019, - Ebony Vagulans was the last person to audition for Alexa's sidekick, Madison. Lucy Lawless said she knew she was the one when she met her, stating that that Ebony came in with a lot of energy, intelligence, talent, and that she felt comfortable with her.
My dad taught me, he's a cook.
Alexa Crowe: Oh, yeah, did he also teach you to be a smart-arse?
Madison Feliciano: No, I think I picked that up more recently.