"Hae-in is a key character in the Japanese manga ""Salad Days (Seolnamu)."" She is introduced as a cautious and reserved person who has difficulty expressing her emotions. However, as the story progresses, we see her grow and become more confident in herself.

Hae-in's personality is reflective of her past experiences. She has been hurt in the past, which has made her reluctant to trust others. Despite this, she is still compassionate and caring towards those around her. Her kindness shines through in her interactions with her friends, especially towards the protagonist Hye-ju. Hae-in is always willing to lend a listening ear and offer support whenever needed.

One of Hae-in's defining traits is her love for art. She is passionate about creating and is often seen working on her next project. Her talent is evident, and her love for art is what brings her closer to Hye-ju, who shares the same passion.

Hae-in's relationships with the other characters in the manga are complex. She has a close friendship with Hye-ju, but also harbors feelings for her. Hae-in's feelings towards Hye-ju are complicated, as she struggles to come to terms with them due to societal expectations and personal fears.

Despite this, Hae-in is not afraid to stand up for herself. She is fiercely independent and determined to pursue her dreams, even when faced with obstacles. Her strength lies in her ability to persevere in the face of adversity.

In conclusion, Hae-in is a multifaceted character who has a significant impact on the story of ""Salad Days (Seolnamu)."" Her reserved personality, passion for art, and complicated relationships make her an intriguing character to follow. Through her growth and development, she becomes a beacon of strength and inspiration to those around her."