What happened to Ariel's sisters?

My entry for the contest at Were sidekicks also get their happy endings  
Contest 4-Sidekicks Live Happily... (new deadline)

I decided to imagine a life for ariel's sisters:
Attina will take over as ruler of the sea after her father. She is a strong and fair ruler but did have to learn a lot to get to that point. She will have twins who will take over after her 
Alana will travel to the land of fantasia, as she heard many stories of the beautiful flowers that grow there. She will meet a handsome centaur and fall deeply in love with him  
Adella will marry a handsome merman (can you guess who?) And have 7 daughters just like her mother  
Aquata will find she inherited the powers of ursula the seawitch, after her death. She had to learn how to use them, which was not easy. But now she uses her powers for good as the new seawitch  
Arista is the only one of triton's daughters that will continue to sing and play music, she tours the seven seas and is very famous. Her manager is in love with her, but she does not know ... yet  
Andrina will join the sea army to protect her kingdom. In the beginning the other warriors think she is silly with her jokes, but when a battle breaks out they sea that she can really kick some but