Aizawa
From Squid Girl Wiki
The Aizawa family is made up of the three siblings Chizuru, Eiko, and Takeru Aizawa. The three siblings live together in one house and the elder two own and run the Lemon. The Aizawa siblings' parents have never been mentioned or shown in the anime, the siblings appear to live alone and independently. After the TV at the Lemon breaks down the Aizawa family takes Ika Musume in as a member of the household.
