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