Copy 1: Farmer's son-in-law and poor concubine's daughter
Copy 2: Loli Master and Loyal Dog Apprentice
Copy 3: The yandere brother and the arrogant sister
Copy 4: The Domineering Prince and the Cold-hearted Military Advisor
…
The heroine's role during time travel is uncertain. Sometimes she is a cannon fodder NPC, sometimes she is a vicious female supporting character, and sometimes she is the heroine.