The man with white hair is Prynne.
The one with blue hair is Linglan.
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The second "stranger next door"
Yoshida Haru, the hero.
The heroine Mizutani Shizuku.
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The third "bingguo"
Oreki Houtarou, the hero.
The heroine Chitanda Eru.
The other two are men and women: Tombu Rizhi and Ibara Mayaka.
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They are all great works ~ recommended!