The Cu Sith are powerful quadrupedal demon hound who haunt the highlands of Ireland and Scotland.
Not long after Wolfsbane returned to X-Factor pregnant with Hrimhari’s unborn child, the Cu Sith were drawn to New York City along with many other animalistic demons and gods. The Cu Sith ultimate goal for the child remains unclear, but it seems to not care about attacking and killing others to get to the child.
The Cu Sith are powerful demon hound. When a Cu Sith is injured or bleeds by a metal weapon, the blood will regenerate and multiple into more Cu Sith. The Cu Sith are immune to the high acoustic attacks from Banshee and claim to be immune to the shriek of the real Banshee.