Cha Hae-In from Solo Leveling is an S-rank hunter, known as the strongest female hunter in South Korea, famous for her exceptional skills. Initially, Hae-In is drawn to the enigmatic aura of Sung Jin-Woo, but after developing feelings for him, she becomes increasingly open about her affection.
In the early events of Solo Leveling, Cha Hae-In and Sung Jin-Woo do not have any direct connection. They are strangers, but Jin-Woo might have heard of Hae-In due to her reputation as the ninth S-rank hunter in South Korea. The only commonality between them is their profession; ultimately, their paths have crossed. As the story unfolds, the relationship between Cha Hae-In and Jin-Woo develops naturally, leading to a deepening bond.
In Solo Leveling, the aura of Sung Jin-Woo captivates Cha Hae-In

Cha Hae-In is unlike any other hunter in Solo Leveling because she is sensitive to mana. In the presence of a magical beast or a high-mana hunter, Hae-In becomes acutely aware of their aura. This is one of the reasons why Hae-In tends to distance herself from other hunters, as the overwhelming scent can be difficult for her to handle.
On the other hand, Hae-In finds Sung Jin-Woo’s scent particularly unique, as he does not emit a strong odor. In fact, Hae-In realizes that Jin-Woo has a faint, pleasant scent, which draws her closer to him. Additionally, Jin-Woo’s radiant aura makes Cha Hae-In increasingly curious about his true identity and abilities.
Sung Jin-Woo earns the respect of Cha Hae-In

As an S-rank hunter, Cha Hae-In takes pride in her immense strength and extraordinary abilities. She holds a deep respect for those who can fight on par with her. Therefore, it is no surprise that the overwhelming power of Sung Jin-Woo eventually captivates her, even though she initially has no knowledge of his hidden abilities. At first, she believes Jin-Woo is inferior due to his lower rank until she witnesses his prowess in battles.
Gradually, Hae-In begins to view Jin-Woo differently. She starts to inquire more about him and his abilities in her quest to understand him better. In a short time, Hae-In’s feelings for Jin-Woo grow, resembling those of a girl who begins to feel anxious when her crush is nearby. She also expresses more emotions than before, unlike her previously composed and distant self.
Cha Hae-In realizes her growing feelings for Jin-Woo

Hae-In is one of the few fortunate individuals to survive on Jeju Island, where she encounters Sung Jin-Woo. She nearly meets her demise at the hands of the King of the Giants until Jin-Woo arrives to save her, akin to a superhero swooping in at the last moment to protect her. However, Jin-Woo’s heroic acts have deeply impacted Hae-In. The first time Hae-In hears Jin-Woo’s voice on Jeju Island, she immediately feels joy and relief.
After the incident on Jeju Island, Hae-In can only think of Jin-Woo and wants to join the Ahjin guild. She tries to be more proactive in investigating Jin-Woo and his intentions, but soon realizes that she is deeply infatuated with him. Ultimately, Hae-In begins to contemplate how to stay close to Jin-Woo and fight alongside him until the very end. At that moment, the hunter recognizes that she has fallen for Jin-Woo and that there is no escaping her feelings.
The relationship between Cha Hae-In and Jin-Woo

Over time, Hae-In becomes increasingly interested in Jin-Woo, especially regarding his personal life and the women he is close to. She even starts to feel a sense of jealousy upon discovering that Jin-Ho, Jin-Woo’s younger brother, joins the Ahjin guild in her place. Hae-In begins to question her own worth and what she might be lacking.
Despite this, Hae-In’s feelings for Jin-Woo remain steadfast. They begin to grow deeper, even as both individuals initially treat each other with caution. Hae-In finds solace in Jin-Woo, and conversely, there exists a tension between the two due to the perilous world they inhabit. However, moments they share, such as playful interactions in the park, symbolize their budding relationship amidst the challenges they face.
To this day, many fans are confident that Sung Jin-Woo and Cha Hae-In will have a happy ending in Solo Leveling. They start as comrades but ultimately become romantic partners, forming a deep emotional connection.