The Light Novel series is the source material for the adaptation of the Anime and Manga series. The information and terminology on the article will be based on the source material rather than the adaptions.
According to Rozemyne, he appears to be in his fourties and in his prime.
During the graduation ceremony of Prince Anastasius and Lady Eglantine the sovereign high bishop along with all other nobles present witnesses the light of a blessing appearing out of nowhere and falling upon the pair, though appearing to be centered more on Eglantine than the prince.
In the following commotion the sovereign high bishop declares this came directly from the gods to bless Lady Eglantine's upcoming wedding with Prince Anastasius
The following year a ternisbefallen attacks Ehrenfest's gathering spot at the Royal Academy and is defeated by the Ehrenfest students led by Lady Rozemyne. During the investigation of the incident, several questions arise in regard to Rozemyne, which prompt the sovereign knight's commander Raublut to call for a comparison of the bibles of the Sovereign and Ehrenfest temples.
Since the pages of the main bibles of each temple are protected by enchantments and appear blank to anyone without it, the sovereign high bishop attended the inquiry personally to allow the comparison to take place. In the course of the meeting it became clear that even with permission, this enchantment or one like it still kept parts of the written text blank for readers who didn't meet certain requirements. Ferdinand of Ehrenfest speculated that the requirement to read those texts might either be mana capacity of elemental affinities, since of the people present and with permission several people were clearly able to read the text, but Richelion and his subordinate Immanuel - the sovereign high priest]] could see no text on those pages.
One of the passages hidden to the pair of sovereign priests is a prayer to invoke the blessing of the God of Darkness, which allows to create black weapons.
During the meeting Immanuel also questioned why Lady Rozemyne hadn't been sent to the sovereign temple after the purge and stating that she should be the high bishop of the Sovereignty rather than Ehrenfest, earning him a very dissatisfied look from Richelion, before being shot down by Ferdinand, who curtly explained that as an archduke candidate, the Sovereignty couldn't have her.