Mithyn

So far we know very little about Mithyn, other than she appears to be some kind of divine being or goddess. During the interlude between chapters 2 and 3, she discusses Zelica's captivity with Mystery Divine Being as well as a mysterious tower that seems to be what broke King Alonon's spirit when he looked inside.

Given Vera's impression that the Goddess of Magic has wings, she was considered a likely candidate for the role, until it was confirmed that she's indeed her.

She meets Simon in the Tower during the war on Thenours. She confirms that she's the Goddess of Magic and offers some help, but seems mostly concerned about other matters. Simon describes her as someone who looks like she was deeply hurt in the past.