Seven Seas goes by the name of Sven. She is exceptionally good at predicting the tides and weather at sea and many seaponies believe she is good luck to have on board.
Having gotten a lot of flack in equestria after queen chrysalis, due to the color of her magic, Sven tends to move from boat to boat where she is needed and has not returned to her hometown in some time.
Her cutie mark is a conch shell.
She is pleasant tempered but can be fiesty when angered. Generally she is well liked but her affinity for water and the ocean made her a bit of a pariah in her landlocked birthplace. She has had good luck in the oceanside towns with the ponies there.