Konata-Typical girl otaku fangirl. Made so that the audience would become attached to her. Pedo and lazy to draw niche audiences.
Tsukasa-Sweet girl. A bit of a ditz, she never can seem to fulfill her expectations, or those who have expectations of her. Always compared to her sister.
Kagami-Tsundere, but also a general perfectionist and go-getter. Would make a good class president or manager.
Miyuki-Bullshit secondary filler character.