Yan Kaisen is a major character in the Ghostblade universe, an original fantasy graphic novel series by WLOP. Yan is a highly skilled swordswoman and a member of the royal guard, known for her unwavering loyalty and strong sense of justice. She plays a crucial role in protecting Princess Hina and navigating the turbulent political landscape of the realm. Yan's determination, inner strength, and mysterious past make her an integral and beloved figure in the series, admired for her bravery and dedication.