Konata Izumi

Kagami Hiiragi

Miyuki Takara

Tsukasa Hiiragi

Ayano Minegishi

Misao Kusakabe

Minami Iwasaki

Hiyori Tamura

Patricia Martin

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Nanako Kuroi

Hikaru Sakuraba

Konata's Father Sojiro Izumi

Konata's Mother Kanata Izumi

Konata's Cousin Yui Narumi

Konata's Cousin Yutaka Kobayakawa

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The Twins' Father Tadao Hiiragi

The Twins' Mother Miki Hiiragi

The Twins' Sister Matsuri Hiiragi

The Twins' Sister Inori Hiiragi

Pet Goldy

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Miyuki's Mother Yukari Takara

Pet Cherry

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Minami's Mother Honoka Iwasaki

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Hikage Miyakawa

Hinata Miyakawa

The Miyakawa family is not related to the main cast, but they are in a couple of skits in the main Lucky Star anime, and they are the center of the short-form anime spin-off Miyakawa-ke no Kuufuku (The Miyakawa Family's Hunger), so I included them here in the families section because they are noteworthy as a family.

Minoru Shiraishi

Akira Kogami

There are a few characters that are either pure skit characters or exclusive to one piece
of media so I haven't included them here yet. I'll add them in the future though.