Don't introduce sweetheart characters, just say Chinese names and Japanese names, both of them.

Hinamori Amu

Chinese name: Hinamori Amu.

Japanese name: ひなもりぁむ

Hotori Tadase

Chinese name: Hotori Tadase.

Japanese name: ほとりただせ

Tsukiyomi Ikuto

Chinese name: Tsukiyomi Ikuto.

Japanese name: つきよみィク

Tsukiyomi Utau/Song Xingming (Xing Na has been declared as a mistranslation)

Chinese Name: Tsukiyomi Utau/Star Bai Song.

Japanese name: ほしな Song.

Fujisaki Najihiko/Fujita Nadihiko/Fujita なぎひこ/Fujita なでしこ

Chinese Name: Fujisaki Nagihiko/Fujimori Nadeshiko

Japanese name: Fujiなぎひこ/Fujiなでしこ

Sincere car/sincere glass dance

Chinese Name: Sincere Glass Mo/Sincere Glass Dance

Japanese name: Sincerity.

Souma Kukai

Chinese name: Souma Kukai.

Japanese name: そぅまくぅか

Sanjiu Kaili

Chinese name: Sanjiu Kaili.

Japanese name: さんじょぅかぃり

Lulu? Don? Maurus Lou? Admiral of the Grand Fleet: Isoroku Yamamoto

Chinese name: Lulu? Don? Maurus Lou? Admiral of the Grand Fleet: Isoroku Yamamoto

Japanese name: ルル? ド? モルセール? やまもと

Sakurai Yua

Chinese name: Sakurai Yua.

Japanese name: さくらぃゆぁ

Nobuko nobuyuki

Chinese name: Kiki Shinko

Japanese name: さぇきのぶこ

Hiiragi Rikka

Chinese name: Hiiragi Rikka.

Japanese name: Hiragi りっか

Ichinomiya Hikaru

Chinese name: Ichinomiya Hikaru.

Japanese name: ぃちのみやひかる

amakawa tsukasa

Chinese Name: Tianhe District

Japanese name: ぁまかわつかさ

Nikaidou Yuu

Chinese name: Nikaidou Yuu.

Japanese name: にかぃどぅゆぅ

Sanjo Yukari

Chinese name: Sanjo Yukari.

Japanese name: さんじょぅゆかり

Yamabuki Saya

Chinese name: Yamabuki Saya.

Japanese name: やまぶきさぁや

I'm exhausted! )