Love Live idols' true sign combinations according to this website: Link

Honoka: Taurus-Leo

Kotori: Leo-Virgo-Scorpio

Umi: Aquarius-Pisces

Hanayo: Gemini-Capricorn

Rin: Libra-Capricorn

Maki: Aries-Scorpio

Nico: Gemini-Cancer-Leo

Nozomi: Taurus-Gemini-Capricorn

Eli: Libra-Sagittarius

Chika: Cancer-Aquarius

You: Aries-Pisces

Riko: Virgo-Sagittarius

Hanamaru: Capricorn-Aquarius

Ruby: Taurus-Virgo

Yoshiko: Gemini-Scorpio

Dia: Taurus-Scorpio-Sagittarius

Mari: Taurus-Gemini-Sagittarius

Kanan: Cancer-Capricorn

Ayumu: Aries-Capricorn-Aquarius

Ai: Taurus-Gemini-Leo

Setsuna: Cancer-Aquarius

Kasumi: Virgo-Sagittarius-Capricorn

Rina: Libra-Aquarius

Shizuku: Scorpio-Pisces

Emma: Capricorn-Aquarius

Kanata: Cancer-Scorpio-Sagittarius

Karin: Aries-Gemini

Sarah: Aries-Cancer-Pisces

Leah: Taurus-Scorpio

And yes, I didn't include the A-RISE members since they don't have confirmed birthdays