Can sense death: Y! She's undead undead undead undead undeader than dead. also half-demon and connected to her canon's Hell analogue, but it's unclear if the Nightosphere is an actual afterlife?? let's roll with it tho. plus, she can raise and control corpses. i think that's everything.
Visible cause of death: Safe to assume he'd see black splotches sorta fuzzily overlapping with the puncture scars on her neck.
Command level: N/A