Kirino Kousaka is an Avid otaku girl who is very fond of Adult-rated games (althought she was only 15 years old), she the younger of the two siblings of the Kousaka family, she is very clever and seems to have the perfect life as overarchieved student with rich family, but she got a secret about her hobby (as Otaku and adult-rated game fans).
Kirino has long Venetian blonde hair and aqua-colored eyes, just like on this Kirino Kousaka Cosplay by Hayase Ami (different eye color tho). Hayase Ami has shown Kirino nature who likes Athletics by wearing clothes like on this Kirino Kousaka Cosplay photo, it's japanese school sports wear right? we just need to remove her "Tenshi no Shippo" from her back ^^.