dermoni fu'ivla

x1 is a demon of type/mythology/religion x2

Generally evil. See pacru'i, lijda, angeli, cevni, crida, di'albo, dairmoni

In notes:

crami
x1 is a mythological/fantastic creature [mythical organism] of mythos/religion/story/culture x2.
dairmoni
x1 is a daemon/familiar spirit of type/mythology x2
di'albo
x1 is a devil of type/mythology/religion x2
pacycrida
p1=c1 is a demon (malevolent mythological humanoid) of mythos/religion c2.