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Eiko Aizawa.png

Eiko Aizawa is a protagonist in Shinryaku! Ika Musume. Eiko is friends with Ika Musume and helps her sister in running the Lemon beach house. She is an avid video gamer and "considers gaming as her life". She is not very good at math to the point that she begged Ika Musume to teach her. She is hot-headed and gets angry easily especially to Ika Musume.

She was voiced by Ayumi Fujimura in the Japanese version, and by Heather Pennington in (season 1) and Kira Vincent-Davis in (Season 2) in the English version.


Eiko is a bit of a hyper-tomboy as shown in her clothing choice. She hates wearing dresses and skirts.

Eiko appears very violent when she is first seen as she brutally rubs her fists on Ika Musume's head when she makes a hole in one of the wall in the Lemon Beach House. She is a strong-minded girl and constantly has to keep Ika Musme in check. She likes to play video games and dislikes studying. She could possibly have a Tsundere personality.

Names In Other Languages

Eiko keeps her Japanese name.

Language Name Etymology and Meaning
Latin Eikō Aizawa, Gen. Eikōnis Aizawis Nominative borrowed from her Japanese name.