My Ghostly Twin

My best friend was killed in a motorcycle accident. He was eighteen years old like me when he died. I was invited to a lagoon and I decided to summon Jesses spirit while I was in the water. I didn't know how to swim and I almost drown while calling for Jesse. The moment I reached shore a strong realization came to my head. The only way that I could see Jesse again is by being dead like him!People tend to summon a loved one when they die.
Sometimes the right soul or spirit hears the summoning, but sometimes the ones listening are the Soul Thieves. A Sentinel is in charge of guarding human souls from the Soul Thieves who sells them to a diabolic goblin named Azura. She eats the souls to stay young and powerful. My name is Leila and I was named an Earth Sentinel by my dead twin sister Lia. My mission is to battle Soul Thieves and destroy Azura with the help of a nineteen-year old Earth Sentinel named Max and his sister April.
The three of us were given a special power to help us be victorious.