It’s been emphasized several times that the prince is a very skeptical person trying his best to survive in the midst of a political struggle. His knight is literally from a family that wants to off him. It would be out of character if the prince decides to trust Kaisel and be nice to him after this one assasination attempt that for all he knows could have been planned by Kaisel’s fam （￣へ￣）
It’s been emphasized several times that the prince is a very skeptical person trying his best to survive in the midst of a political struggle. His knight is literally from a family that wants to off him. It would be out of character if the prince decides to trust Kaisel and be nice to him after this one assasination attempt that for all he knows could have been planned by Kaisel’s fam （￣へ￣）