I was informed this will be a king, maybe Gagik Artsruni, founder of the church, is enjoying the fruits of the vineyard of the Lord (paradise), while on the left a man is picking pommegranates (frequently represented in Armenian iconography), a symbol of eternity.
For a source Découvertes Gallimard n° 464, published 2005, Anne & Jean-Pierre Mahé (University level), L'Arménie à l'épreuve des siècles (Armenia facing the centuries) Pages 58-59 (with illlustration) was given.
Thanks for this comment.