Ika has understandable grievances regarding what humans had been doing to the sea, but it appears to be the only driving factor behind her attempt to invade humanity by herself. The first person to address her, Eiko Aizawa, quickly learns that Ika has never been on the surface before, and thus greatly underestimates the human population and their capabilities. The series as a whole focuses on Ika's development as a character on the surface. Shrimp is her favorite food. Want to protect ocean too.