This trope in this kind of manhua is unexpected if I want to say I would say that the attendant would just blab about how he wanted to protect the princess by betraying her like what the helly. He serious bro could have told her before hand or given hint but no bro decided to become the backstabber 
maybe because he knew he doesn't have power to protect the princess .seriously this is kinda annoying 😑
maybe because he knew he doesn't have power to protect the princess .seriously this is kinda annoying 😑