Very good. [Viridi pointedly ignores Richard's existence for now. She begins explaining to the child instead] First, you have to make a promise. It's part of being a paladin. It means one who is sworn to a god - in this case, me. You have to promise to protect your world, and to uphold the balance of nature, with all your heart.

Here, extend your hand, put it on mine [she extends her hand], and make your oath.