"Lan Wangji is a character in the Japanese manga ""Divine Doctor: Daughter of the First Wife"". He plays an important role as a love interest and ally to the main character, Bai Yan.

Lan Wangji is a noble and stoic cultivator from the prestigious Lan clan. His stern demeanor and strict adherence to Lan sect rules make him appear unapproachable to those around him. Despite this, he possesses a kind heart and strong sense of justice, often going out of his way to help others.

Initially, Lan Wangji is cold towards Bai Yan, believing her to be a troublemaker who disregards rules and authority. However, as he gets to know her better, he comes to respect her intelligence and medical skills. Soon, their relationship begins to develop into a romantic one as they work together to fight against the corrupt forces that threaten their world.

In battle, Lan Wangji is a formidable warrior, known for his lightning-fast swordsmanship. He is also skilled in the use of spiritual energy, which he can manipulate to enhance his abilities and enchant his weapons.

Despite his skills, Lan Wangji is not invincible. He has his own insecurities and weaknesses, such as his fear of disappointing those he respects, particularly his mentor. He also struggles with expressing his emotions, leading to misunderstandings with Bai Yan.

Overall, Lan Wangji is a complex character with a strong sense of justice and a stoic exterior hiding a kind heart. His relationship with Bai Yan adds an emotional depth to the story and showcases his willingness to put himself in danger for those he cares about."