[@Timuir]

I'm a bit hesitant on given Medium's 'abilities' beyond basic rituals(not including what they get from the contract), mediums alone are fairly rare and practicing magic outside of demon contract is also  very rare. But for the concentration to let him see better I guess its fine, leans into the idea of a supernatural awareness quirk. Not sure how he would have gotten a focus crystal though or what he can use it for, I can see something being an instrument for rituals? But that would be a conduit type item most likely and not inherently magical on its own, just for clarification. Outside of demons and netherworld related stuff magic is very, very rare in the human world for a reason.

While I'm glad you're interested in the dmPC, I'd prefer if players get together first as the DMPcs are primary backups to uneven player numbers. Its for fill as needed primarily and I'd rather see at least a few partner pair ups among players first, plus this concept might work better with another player that joins!