Johanne O. Marley/Abilities and Powers

Johannah, as one of the two captains of the Purple Dawn Pirates, makes one of the crew's most powerful figures. She is generally strong despite her "weakly" appearance, despite her being very tall as she is almost twice as tall as a regular human. When she was a child and something she hid from her parents, she can carry a lot of iron bars to the family's warehouse. She can also carry her sick grandmother into the local hospital.

At age 18, she managed to carry a large boulder and managed to crush it using an iron bar she saw nearby. She also used to be a good swimmer, as she managed to swim from one end to an island to another in a relatively short time, almost as fast as a regular man running.

Devil fruit
Further information: Shuso Shuso no Mi 

Johannah ate the Shuso Shuso no Mi, a Logia-type devil fruit which allows her to have the ability to control, manipulate and become bromine at will. When she ate this fruit, she was immediately granted intangibility, something Jonathan never had until the timeskip. Johannah can generate red dust-like clouds made of bromine which allows her to knock down enemies.

Singing ability
Further information: Lullaby 

Johannah had a strange singing ability called "Lullaby" which grants her the ability to have the voice of sirens. Most of the time when she sings, the people listening to her fall asleep, indeed its title. Over time, she used the ability against opponents and to keep her in a calm mood while fighting. This is one of the abilities in the world mistaken for a devil fruit as her singing can lull people to sleep.