It's hard to say for sure. The Joker's feelings for Harley Quinn vary depending on the comic and the writer. Sometimes it appears as if he loves her, but it's often a toxic and unpredictable connection.
In some fanfictions, Harley might react with shock and disbelief at first. She has been through so much with the Joker that she might not trust his words immediately.
Harley might react with shock at first. Given Joker's usually callous treatment of her, hearing him say 'I love you' would be unexpected. She could then become extremely happy, like all her dreams have come true.
Harley's character could develop in many ways. She might become more protective and motherly, which is a big change from her usually wild and carefree self. This new - found sense of responsibility could make her question her relationship with Joker and the life of crime they lead.
At first, Harley Quinn is a strong - willed psychiatrist. But as she falls in love with Joker, she starts to lose her sense of self. She becomes more submissive to his whims and starts to embrace his chaotic lifestyle.
Their relationship could develop through shared experiences. For example, they could go on heists together and during those times, Joker could start to see Harley in a different light. He might notice her intelligence and loyalty more and more.
Well, the real story of Harley Quinn and Joker is that Harley Quinn started as a psychologist trying to understand the Joker's mind. But he warped her perception of right and wrong. Joker, being the unpredictable and cruel villain he is, made Harley into his own personal plaything. Their relationship is marked by violence and a strange kind of loyalty from Harley's side. For example, she'll do anything he asks, even if it means putting herself in great danger, just because she believes she loves him, which is really a warped form of love considering how he treats her.
The fanfiction has a big impact on the perception of their relationship. By showing Joker hurting Harley, it emphasizes the negative aspects. Readers start to understand that Harley was in a cycle of abuse. It also shows that her loyalty to Joker was misplaced. This can lead to a new understanding where Harley is seen as a character who needs to break free and find a better path, and Joker is seen as a truly villainous figure in the context of their relationship.
Well, Harley Quinn first met the Joker when she was working in Arkham. The Joker is this super - insane and manipulative guy. He saw an opportunity in Harleen. He started to play mind games with her. Told her all these crazy stories and ideas. Harleen, being young and a bit naive in a way, fell for it. And she started to see the world through his eyes. Before long, she was breaking him out of Arkham and joining him in his criminal sprees. Their relationship is complex. It's not just love. It's more like an obsession on Harley's part and a tool - like use by the Joker.