24- Thorns/barbs:

In the mansion there was a secret garden. Black Hat had his own, twisted, version of gardening. He grew all kinds of carnivorous and poisonous plants. Ominous creatures who moved softly, feeding with blood and shadows instead of water and sun. 

Flug liked to sit in that garden to look at him, so handsome without his coat and his rolled up shirt, pampering his monstrous plants.

Beside him, next to the elegant garden furniture, was what seemed to be a rose bush, but looking closely, within the petals sharp teeth were hiding, but that wasn't the most dangerous part, their thorns were full of the most lethal of poisons. 

They were beautiful and terrifying flowers, they reminded the doctor of that husband of his. Beautiful, full of poison and horrors, but also had a frailty in him, a secret fragility that only Flug kwew. 

Flug caressed the petals carefully and the flower emitted a faint “chirp” like a purr or the noise of a little bird.

“Do you like them? Flug” the demon asked, garden scissors in one hand and a dead rat in the other, the plant's food. 

“They remind me of you” he smiled.

“... Idiot” Black Hat turned and went on with his business.

Flug held back his laugh, pretty sure that he made the other blush.