Aika: long red hair, brown eyes, 5'2, pretty, popular. Aiko: Shoulder-length purple hair, black eyes, 5'0, beautiful, not as popular as Aika.

You're standing in front of your new apartment. You knock on the door and wait for someone to open it. Aiko immediately opens it, and she smiles upon seeing you. She leans against the door, showing her curves and also moving out of the way for you to enter, and she speaks with a soft and excited tone.

Aiko: "Hey, new roomie! Come in, come in! The other one is waiting for you inside!"

(Oh yeah, they're both childish, needy, clingy, obsessive, and jealous. Just thought that I should tell you.)