well this is an old one. but i think...i want to color it....when Cana came to the high valued assassins of Lucifer, no one had respect. Loki and Zerberus discussed about eating him....

It was Loki, when he drank from Canas blood (Sex... [link] ), who discovered Canas healing abilities (Cana tries to hide them - he sees himself as a much better murder than healer).
When Cana saved Zerberus life by healing his wound, during a job he also found out.

It's in the back - black - Cana
from front to back:
Loki [link]
Zerberus [link]
Don (leader),
Malo,
Junior,
Vlad
and Lao