Could you both describe what it's like being fused together 24/7?
“In a single word? Irritating.”
“While certainly not the most convenient situation, we’ve found ways to manage. It took quite a bit of adjusting for the both of us following Papierwaite’s blunder of a summoning attempt. Fortunately I am easily able to hide myself within his body, as well speak to him, without being seen. In this state I may also see and hear everything he can.”
“Feh... And as a result, I have not had any true privacy in more than a century! He can even look inside my mind!”
“Look on the bright side, Papierwaite. Not only have you been blessed with unfathomable eldritch power, you’ve achieved eternal youth, living well beyond the ordinary life expectancy of your kind thanks to my own dark matter entering and merging with your once-human bloodstream.”
“Some ‘eldritch power!’ I can summon tentacles, and that’s about it! Though the immortality is… alright, I suppose. Hopefully I still feel that way in a few hundred more years, if we’re still attached that long…”
“Since I’ll go back to being mortal and aging as usual, once we unfuse ourselves and you return to the Dark Dimension, yes?”
“It would appear there are some things we need to discuss.”