Random name stuff!
Unique first name kanji (current members only):
早 (Saki), 貴 (Saki)
千 (Chisato)
保 (Riho)
亜 (Ayumi), 佑 (Ayumi)
優 (Masaki)
遥 (Haruka)
水 (Haruna)
真 (Maria)
芽 (Meimi)
茉 (Maho), 穂 (Maho)
由 (Yuka), 加 (Yuka) (Kaga Kaede's surname also contains this kanji)
朋 (Tomoko)
友 (Sayuki)
林 (Karin)
知 (Chisaki)
嬉 (Uta), 唄 (Uta)
央 (Rio)
海 (Ayaka)
麗 (Reina)
夏 (Natsumi)
桜 (Sakurako) (Oda's name is written in hiragana)
玲 (Rei)
空 (Kisora)
安 (Ami)
伶 (Reina)
夢 (Yumei)
楓 (Kaede)
結 (Musubu)
未 (Miu), 羽 (Miu)
瑠 (Ruru)
栞 (Saori)
渚 (Nagisa)
葵 (Kizuki)
萌 (Momoko)
歩 (Mizuho)
眞 (Mao), 緒 (Mao)
帆 (Honoka)
Girls with names written in hiragana:
Sakura (さくら)
[Uemura] Akari (あかり)
Yumeno (ゆめの)
Hikaru (ひかる)
Kurumi (くるみ)
Rion (りおん)
Kokoro (こころ)
Girls with names partially written in hiragana:
Minami (みな美)
Girls with names written in katakana:
[Ogata] Risa (リサ)
Girls with the same name and same kanji:
Mai (舞): Hagiwara and Ozeki
Girls with the same name but different kanji:
Mizuki: 聖 (Fukumura), Murota (瑞希), Kanatsu (美月)
Kanon: Suzuki (香音), Fukuda (花音)
Haruna: Iikubo (春菜), Ogata (春水)
Ayaka: Wada (彩花), Hirose (彩海)
Akari: Takeuchi (朱莉), Uemura (あかり)
Momoko: Tsugunaga (桃子), Shimano (萌々子)
Risa: Yamaki (梨沙), Ogata (リサ)
Girls with the same surname and same kanji:
Suzuki (鈴木): Airi, Kanon
Wada (和田): Ayaka, Sakurako
Inoue (井上): Rei, Hikaru
Girls with the same surname but different kanji:
Ogata: Haruna (尾形), Risa (小片)
-The most common first name kanji is 美 (mi), with 7 uses.
-The most common surname kanji is 田 (ta/da), with 12 uses.
-7 girls have names that only use one kanji.
-7 girls have names that use 3 kanji (9 if you count two that use 々).
-々 (the repeating kanji) is used 4 times in first names and one time in a surname.
-6 girls have completely unique first name kanji combinations, not counting those with only one-kanji names.
By letter:
A: 9
C: 2
E: 1
H: 5
K: 10
M: 21
N: 3
R: 11
S: 5
T: 1
U: 1
Y: 3