Medical officer on board the Cha-Cha Maru, Mei Lin Jones is charged with the health of the crew. The medical talents of this stunning beauty is tested to the limit, especially when Tita is gravely injured at the hands of Guizel.        In the manga, Mei is depicted as a sister figure to Tita; Tita was raised as part of Mei's family after her father died. It is also revealed that Mei once saved Tita's life when Tita was suffering from a deadly disease called 'Ietta Fever.'

Set on the planet Yietta, whose colonists make their living by exploiting the planet's unique liquid-gas oceans, Plastic Little begins as the Yietans are finally about to pay off their debts to the Galactic Federation. Unfortunately, there are those who would rather not let Yietta slip through their fingers... 
Enter Tita, 17 year old captain of the Cha Cha Maru. Together with her crew, Tita specializes in capturing Yietta's exotic life forms for intergalactic pet shops, but through plain bad luck she finds herself, instead, at the core of a sinister plot to take over Yietta! By rescuing 16 year old Elysse from the very clutches of the military, Tita puts the lives of both herself and her crew in mortal peril... but a girl's got to do what a girl's got to do! 
As the plotters mobilize their forces in a desperate bid to retrieve Elysse, whom they believe possesses a vital computer code, Tita must play a dangerous game of tag with an entire army of professional killers! It's Cat and Mouse on a planetwide scale, with one crucial difference: Mice don't shoot back, but Tita's does! 
(Source: AnimeNfo)

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After her fathers death Tita inherits the submarine ship Cha Cha Maru, and with the help of the loyal crew she sets out to catch the exotic and dangerous creatures of the Sea of Clouds.
 
(Source: Anime News Network)