Okay but Jon being a vampire and Elias being ‘human’(or human adjacent since you know eyes), so like everyone would assume the strong scary vampire is in charge.

However Jon being Jon is not a scary vampire, he’s a sad wet cat of a vampire. He hates feeding on people(complains that he’s a monster)so sometimes Elias just pulls Jon close and makes him feed off him. Elias is the boss in this relationship, and Jon is his pet monster.

Also Jon being able to shapeshifter and using it to be a kitten so Elias will hold him in his lap and pet him.