Could it be that Camilla was the one who bombed the railway before?
Why is she injured?
This wound clearly wasn't caused by the Secret Keepers.
Leonard had seen her in her white-haired state. As a Card Master Apprentice, she was capable of withstanding a first-tier A-rank mysterious Fallen Witch Sect member with her own power. With the right materials, without any mishap, she should have changed her profession to a formal Curse Card Master by now, boosting her combat power at least tenfold.
Who injured her then?
Leonard had previously speculated that the plunderer was setting up a trap to kill the Governor, but now that he saw Camilla here, he immediately felt that something was off.
The monsters in the maze are against everyone, there's no need for the murderer to come in themselves to assassinate the Governor.
Therefore, he felt that his old friend was also accidentally involved.
Moreover, the wound is on her back, was she betrayed by a trusted acquaintance?