Ren was trying to fix up the place after he had been snapped out of his shadow's possession when he spots Thanatos up ahead, and his eyes widen.

"A persona?" He's sure if he still had his, they would be screaming in his head right now.

Wait a minute... This persona feels familiar. And the talks about death, while he hasn't heard of those words before, it gave him a clue as to what this persona and therefore who it is.

His heart hurt when realization hit. He moves towards it, dodging any debris headed his way.

"Makoto! Makoto, please stop!"

He tries to get closer. "I know you can hear me in there. I know this is one of your personas, but this isn't all of you."

He keeps trying to get closer. Aiming to try to hug Thanatos.