Thanatos's floating wobbles slightly as if he's floating on choppy waters. That says enough about exhausted Thanatos is. Did anyone return from that mission feeling fully rested?

"Our worlds have... a slight bit of overlap, and because of that, I fear I distressed him more than help when we met. How much has he told you? About his life before the train?"

Normally, Thanatos would worry about meddling, but this is a kid steeped in death and darkness and summons an entity named after his sister. Ken needs help. He knows he's not the one to do it, but if possible, he'll put as many tools as possible in someone else's hands.