Along with Empyrean's astounding progress, Izroth noticed that Selene's rating increased by two. She also acquired a new skill called Sacred Flames of Purification.
But, since Izroth had Selene accompany Empyrean not long after they formed a contract, he had not gotten the chance to witness what she was capable of firsthand.
'I should take some time to personally oversee Selene's development. As long as Empyrean is with her, there is no need to worry about her safety. But, it will be a little troublesome in the future if I completely miss out on the early stages of her growth.'
Empyrean may have been an extension of Izroth; however, in the end, he was not Izroth himself.