The Main Six - Read Description - Important

My Main Six, no, not Mane Six, this isn't My Little Pony -_-
Here's the information on all six.

Name: Shaker
Species: Rattle
Gender: Female
Personality: The happy-go-lucky of the sister duo. She loves to giggle at any antic that her sister, Hannah, does.

Name: Hannah
Species: Heart
Gender: Female
Personality: The hyper prankster of the duo. Hannah loves doing pranks, even on her parents. She does care for them though. The yellow stripe changes to green when she gets older. The greener the stripe, the less of a pranker and more caring she is.

Name: Heart
Species: Heart
Gender: Female
Personality: Heart's the wife of Rattle. Before, Heart was the meanest female that Rattle ever met. After a few happenings, Heart warmed up to Rattle, she became nicer, and married him.

Name: Rattle
Species: Rattle
Gender: Male
Personality: Rattle is the husband of Heart and my main OC. Rattle, before, was a complete scaredy-cat and is easy to have crying. After a few happenings, Rattle became less of a scaredy-cat and more of a helpful person. He is still easy to get scared tough.

Name: Barbell
Species: Barbell
Gender: Male
Personality: Barbell is the older brother of Rattle. Barbell is composed of two people in one body. The top part is the talker and controls the arms. The bottom one is derpy and can't talk. He controls the legs.

Name: Jellyfish
Species: Jellyfish/Hot Air Balloon hybrid
Gender: Female
Personality: Jellyfish is the childhood friend of Rattle. She is cheerful, helpful, and loves her friends. Jellyfish use to be a regular jellyfish, but after a big mistake, Jellyfish combined with a hot air balloon.