An Si-eun

An Si-eun (安施恩), known in-game as Sieunee (シウネー), is a player of «ALfheim Online». She was the sub-leader of the «Sleeping Knights» guild. As she is an Undine healer like Asuna, her role is to support the other fighters with magic.

Backgound
As with the other members of the Sleeping Knights, she was diving into virtual worlds to improve her life quality since she was diagnosed with acute lymphoblastic leukemia. She was treated with chemotherapy and got better, but after a year she was sick again. Because she wasn't compatible for a bone marrow transplant, she was just treated as a terminally ill patient.

Mother's Rosario
She is with Yuuki and Asuna in an inn on floor 27 of Aincrad as a member of the Sleeping Knights guild. She acts as a support player to her party during battles, not only healing, but also casting buffs over them. With Asuna's help, they manage to defeat the floor's boss. After the guild disbands, she's the only one who faces Asuna and asks her not to look for them. After Asuna meets Yuuki at the hospital, she returns, along the other members to ALO and clear floors 28 and 29. During April, 2026 her leukemia disappears and she was discharged a week prior to Yuuki's funeral. After the funeral, she talks to Asuna and explains everything she passed.

Trivia

 * An Si-eun is actually a Korean name. However, the name was changed in the light novel, because, when Reki was working on the paperback version of his novel, he consulted a Japanese-Korean translator on whether the name he had used in the web novel actually existed. He found out that, although Shiien did not exist, Si-eun was a rather popular name.