Miko always been my favorite character from the start, even before it's revealed that she is actually a fox spirit. she is the only character who shown so much emotions, very energetic and cheerful, and also tries her best to makes Hinako happy. her emotions always feels so genuine too, unlike Shiori who her smile feels so fake because she doesn't know how human emotions and relationship work. Miko also the one who keep push the plot going forward. for example, if not for Miko's advice, Shiori will never tries to repair her relationship with Hinako after the reveal about Shiori's blood inside Hinako's body. and also Miko is the one who become wingwoman so both Shiori and Hinako having nice private talk so Hinako admit that she enjoy the trip. this extra chapter gives us a lot more info about Miko. since she was just a normal fox, then turned into a cold blooded human chomping monster, then tamed by a monk, and eventually learn about the bonds with human which makes her into a good hearted Miko we all know today.