Marina: A skilled deep diver with bipolar disorder who transforms into a lively seal in aquanos. Kai: Marina's calm and witty friend, a music producer with the strength and grace of an orca in aquanos. Nixi: Marina's loyal and snappy friend, embodying a catty jellyfish persona in aquanos. Kali/Aguella: silent but deadly, wanting to replace Marina Jacian: A cruel dolphin ruler in aquanos Leila:shy but sweet crab, owns a restaurant Fynn: a small guarding shark Selene: A fashionista seahorse