In Re:Zero: Regulus' Marriage, Regulus's married life with his wives is an unequal relationship and he is the one who controls everything.
Regulus - The greedy Warden always considers himself a perfect man and wants everything to go his way. Regulus absolutely does not accept any opposition from others, especially the girls he captures to be his wives. With the Lion's Heart ability, he is almost invincible and his opponents are very afraid to confront him.
The Wives of Regulus: Tragic Fate
Forcing the girls
Regulus's marriage to his wives was not a consensual affair, but a way to satisfy his ego and possessiveness. Regulus' wives had no freedom or voice in this relationship, and they often became tools for him to express his greed.

Absolute control by force
Regulus uses his power to stop the flow of time in other people's bodies to keep his wives in a "frozen" state. This causes them to be "immobilized" but still have to exist in a conscious state.
Regulus keeps them in this state to ensure that they cannot act on their own and must obey everything he says.
Instead of being happy, Regulus's married life with his wives was horrible for them. They were like being imprisoned in a golden cage. They were forced to obey Regulus' every request without being allowed to have any personal opinions.
The wives were isolated, not allowed to communicate with the outside world. During that time they were very scared and pressured, because any small action against Regulus's will could be punished. Regulus did not hesitate to use mental violence to control the wives.

View wives as property and tools to strengthen ego
Regulus was so domineering that he never considered the feelings and thoughts of his wives. He considered them his property and wanted to be his absolute owner. This made him extremely cruel and heartless. He forced the girls to become his wives against their will. This showed a complete lack of respect for individual freedom.
Re:Zero: Regulus's Marriage is not a matter of emotional attachment but a tool to bolster his enormous ego. He sees himself as the perfect husband and his wife must not only submit but also show gratitude for his protection, which is essentially control.
Relationship collapse and liberation
When Re:Zero: Warden of Greed was defeated , his power was lost, and the wives were finally freed from their immobility. From then on, they were freed from Regulus' fear and control, both physically and mentally. Re:Zero: Regulus' Marriage ended, opening a new life for the wives.

Lessons from Regulus's Unequal Marriage
The story of Re:Zero: Regulus' Marriage is unfair and unequal. It does not stop at portraying a greedy, evil villain, but also shows selfishness and power imbalance in marital relationships. What can be seen from the beginning is that society does not protect monogamous and voluntary marriage from both sides, while Regulus forced many wives and did not see anything wrong.
Regulus represents self-interest, ignoring the feelings and rights of others. His actions remind people of the importance of mutual respect, especially in marriage.
Re:Zero: Regulus' Marriage has ended and the wives have been freed. Through Regulus Corneas' marriage, we see that even with unparalleled power, one cannot command respect from others. This character's failure is deserved.