For the canon unfamiliar: characters able to detect magic or spirits may notice that Diarmuid is, as it so happens, exactly that. His face is extra magic (and I'd appreciate anyone playing female characters giving that link a quick look because it could be relevant).

Additionally, I have to offer a general warning for the topic of compelled suicide; if you don't want this subject being touched upon in your thread, please let me know!

Notes:

Summoning Circle (cw: bloody angry ghost sighting)

Diarmuid will not be lingering long enough to be interactable, here, but characters who might have witnessed the state of his arrival are welcome to refer back to it should they encounter him at a later point. He came to visibly injured, with blood spilling from his face and chest and coating the blade of the spear accompanying him; characters close enough to read his expression could note intense pain, anger, and an unnatural glow in his eyes (think burning embers). He will have been radiating a wild, hostile energy in the brief moment before he gained clarity and discorporated, bodily vanishing like ash scattering on the wind. Don't worry about it! This is probably fine.
 

Psychic Echoes

Encounters in the hospital and afterward may include Diarmuid projecting a lot of bitter feelings in the vein of grief, shame, and anger; please let me know if you'd rather opt out of this coming up in your thread!
 

Husks and Haunts: Hunting Party

[ Drifters fighting through the halls of the hospital may find themselves with a sudden ally: dropping down onto a monster or perhaps seeming to spring from nowhere, a crimson spear is thrust through the body of its target and then carved outward. The man on the other end of it is uncommonly clean and composed for all the grime and horror of their surroundings, with only a light sheen of sweat on his forehead and the weight of each deliberately steadied breath to suggest he's already been here a while.

Perhaps the body of the felled monster begins to dissolve, and for a moment the curling brand of the sigil on his chest glows strongly enough to be visible through the dark teal armour of his body suit.

Perhaps it doesn't, and he clicks his tongue in frustrated disappointment.

Either way, he takes a step back from it as he lifts his gaze to assess the state of his fellow Drifter. Friend or foe? ]
 

Testing: Bonfire Checkpoint

[ The horrors may be increasingly persistent deeper into the hospital, but at least one small space for respite has been stubbornly carved out. It's hard to say what the room originally would have been used for, between the building's uncertain layout and the insistence with which it's been emptied by its newfound guardian; for the moment, however, it's relatively clear of danger and contains a helpful(?) stash of whatever potentially-healing supplies he might have found while hunting.

Other Drifters might encounter the space of their own accord. Those worse for wear might be led to it if he happens upon them in the halls nearby, or perhaps a shift in the gravitational anomaly causes someone to more or less literally fall into his arms.

In all cases, he extends the same offer to anyone in need: ]

You will find rest and safety here if you seek them. [ Gentle words that carry the solemnity of a knight's oath. ] I won't allow even one of those unsightly beasts to cross the threshold in the meantime.
 

Wildcard: 30-foot Vertical Leap?

[ It's only some time later that anyone avoiding the inverted hospital ruins will have a chance to encounter Diarmuid. He can be found in any of the public areas of the Convoy, or the stop, though for a man as decidedly unchanged as he appears he's somewhat difficult to pin down: he has a tricky habit of seeming to vanish into thin air when he's not occupied.

Still, other Drifters might be able to catch him with a request for help. Or come across him hunting down ingredients and utensils for a hearty soup to put on the fire while he's figuring out the necessary repairs for his new motorcycle. Will he be unnecessarily shirtless at some point during this? Probably. At least that'll be a chance for anyone curious to get a good look at the sigil branded conspicuously over his heart. ]