Shout was supposed to be the temporary leader of Jetters, but after they found out Mighty Bomber died, she is now the official leader. She only became leader due to the fact that Dr. Ein and her father are friends, and Birdy turned down the position.
As well as being Jetters leader, she helps her dad in his restaurant to cover for her deceased mother, who died when the Cruise ship she was on sunk and killed everyone on board. Since "Underground, Go! Go! Go!", she is shown to be sensitive about her weight, as she caused an elevator to be too heavy and is a small running gag that other characters tease her about being on a diet.
Throughout the anime, Shout has the tendency to torment White Bomber due to his childish attitude, inexperience and general lack of respect for him, it's because of this that she lives up to her name. However, as time passes, she begins to respect White Bomber, but continues to abuse him because of his attitude towards her, for example whenever he refuses to help in the Ramen shop or gloats about getting another Bomb star. Despite her rather abrasive attitude towards White Bomber and other characters, she does have softer side to her which shows that she suffers from the emotional pain of the loss of her mother, a similar pain she shares with White Bomber.
Shout's relationship with other important figures.
Gangu and Bongo
Shout bears some resemblance to Lilith.