return in palace for revenge, He opposed it. He let Jang Geum to choose between medicine or revenge. After healed by Jang-Deok on his tumor, He returned to the palace as the Queen's physician. Kim Yeo-jin as Jang-deok - a caring and dedicated physician from Jeju and also Jang-Geum's mentor in medicine. Han Ji-min as Shin-bi - a kind and trustworthy friend to Jang-Geum. She entered in Royal Pharmacy with Jang-Geum. Lee Se-eun as Park Yeul-Yee - A palace nurse who offered herself to Choi clan to kill Jang-Geum to gain their trust. Unknown to the Choi's, Yeul-Yee is the adoptive daughter of the former Head Lady, Park Yong-Shin. Lee Seung-ah as Eun-Bi - A palace nurse who is assigned as in-charge of King's medicine until she became the nurse of the Queen Dowager Jasun. Park Eun-soo as Physician Shin Ik-Phil - a strict trainer of Jang-geum and Shin-bi when they enter the palace. He became strict to Jang-Geum not because he doesn't like her but he want Jang-Geum to be better. He became the Queen Dowager's physician, but she doesn't trust him at first because of the story about his patient in the past was died under his care. He later becomes the King's physician, when Jang-geum found the cause and cure for the King's illness. Yeom Hong as Bi Seon - the royal medical staff discipliner and also the assistant head of physician ladies. Professor Lee - another one of Jang-geum and Shin-bi's trainers. He calls physician trainees to become dancers when there is a special event. He is also Queen Dowager Jasun's relative. Soundtrack Theme song The theme song, Onara () is in Old Korean. This produced arguments about the lyrics and how they should be interpreted. As a result, different interpretations surfaced. Eventually the songwriter, Im Se-hyeon, revealed the lyrics. The song is in the pansori style, a particular type of Korean music that emerged during the Joseon Dynasty and was very popular in the 19th century. It utilizes the vocals of one singer, a sorikkun, and one drummer, a gosu, to tell a themed story. The refrain ("He-iya di-iya he-iya naranino") is called chu-imsae and, in traditional pansori, it is supplied by the drummer to give rhythm to the song in addition to the beat. Chuimsae consists of meaningless vowel sounds or short words of encouragement. Chuimsae is analogous to scat singing in jazz nonsense