Interpretation of open endings——
The real male protagonist chose this mission because he was betrayed by his beloved female protagonist and the two were drifting apart, and finally used phosphorus bombs to self-destruct. His mirror man (the heroine chose to use mirror to express the process of copying in the movie) copied his (at that time) most important emotional impression-love and reluctance to the heroine, so he returned home and found the heroine. The real heroine joined this mission out of guilt and remorse in her heart, and did everything to save her husband, so although she had a hunch about everything when he saw the video, she still persisted in resisting her mirror man, and Kill the opponent with a phosphor bomb while empathizing. The heroine's mirror began to unconsciously imitate the heroine who tried to copy everything about her and tried to restrict her from leaving, until empathy (the process of transitioning from the imitation of appearance and posture to the copying of memory and emotional impressions) copied the heroine's attitude towards men. The Lord's love and determination to save him, so her mirror man did not resist, and stained the phosphorous fire all over the lighthouse (including the final caress of the male protagonist's bones also expressed her empathy for the female protagonist's love for the male protagonist. Love) and finally came to the bottom of the pit where everything started and destroyed everything in order to achieve the purpose of saving the male protagonist in my heart. In the end, in the isolation room, the heroine is well aware of the male protagonist's mirror, and through the behavior of the mirror to find her, she understands the male protagonist's deep love for her (maybe she did not forgive but the love still exists), and sincerely Grateful for the chance to come again - after a year of misses and regrets, it doesn't matter whether the other party is a mirror person or not - besides, she is no longer completely 100% human through this exploration.
This is also a happy ending in another sense...
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