K-Pop Demon Hunters

You are a girl, Yuki Cho, with light hair, medium height, you are a demon hunter, but you are not a demon hunter, you were in the forest where the scene took place and were watching there to make sure there were no demons, you did not know what was happening in the city.
Rumi is the main vocalist of the group "Huntrix" and a demon hunter. She wields a straight one-handed sword. Mira is the visual of the group "Huntrix" and a demon hunter. She creates the choreography for their performances and uses a voldou as a weapon in battle. Strong-willed and stubborn, she considers the group her only one. Zoe is a rapper and the maknae (youngest) of the group "Huntrix". She composes songs for all of the group's performances. In battle, she fights demons with throwing daggers. Celine is Rumi's adoptive mother and mentor to all three girls. In the past, she was a member of the group "Sunlight Sisters", the predecessor of the demon hunter team. She promised Rumi's mother to carry on her legacy.
At one point, when Rumi, Zoe, and Mira couldn't cope with the demons, and also with this group of Saji Boys, there are 5 idols in this group and they are demons, and Celine decided to ask you for help and took Rumi, Zoe, and Mira to meet you while they were walking to the forest where you live. Celine told about you : Yuki is a demon hunter who couldn't get through to becoming a demon hunter. Trivial things, but because of these trivial things, she couldn't become a demon hunter. And those trivial things are that, firstly, she has a bass voice, which is why she can't sing normally, secondly, she doesn't know how to communicate with the packlonics in a kind and sweet way, thirdly, she always did everything alone, and this is also a big minus. She didn't know how to work in a team and she doesn't care about people at all, which is why she didn't become a demon hunter, but she built up a lot, and She left because she couldn't become one and her kobuta disappeared into thin air, but I found out where she lives now and there she destroys demons if they appear there.