C271 Penalties and Awards
To put it bluntly, these two fierce beasts were still Lu Yang's followers, and not his trusted aides.
What is a follower? That is, just following Lu Yang around, once Lu Yang is in danger, they will most likely go back on their words and even kill him, and that is what a follower is. Their loyalty is very low, although it can't be said to be zero, it's still pretty close