Ghost Friendship and Loyalty

The book I'm reading that is sadly ending soon in a few chapters is Crown of Three by J.D Rinehart it is an amazing book! Right now Elodie has arrived very close to the castle to battle and save her brother Gulph. She has Trident to fight along with her but also her loyal friend Samial who is dead. She wanted him to fight along her side and that is exactly what hes doing. He brought a whole army with him to fight with her. Though he is different their relationship between them is no different from ordinary however it is far more powereful and now they start heading towards battle!