The main character in the 'girl with a tail story' is likely the girl with the tail. In most stories, the one with the unique feature or situation is the focus. She would be the one driving the plot, whether it's through her attempts to hide her tail, use it for a special purpose, or deal with the reactions of others towards it.
Since I don't know the exact 'girl with a tail story', it's hard to say who the main character is. But generally, it would be the girl with the tail herself.
In some possible 'fox tail girl story' scenarios, aside from the girl with the fox tail, there might be a wise old man or woman in the village. This character could be the one who warns others about the fox tail girl, believing she is a bad omen or, on the contrary, someone who understands her true nature and tries to protect her from those who would harm her. Another potential main character could be a rival fox spirit who is jealous of the fox tail girl's relationship with humans or her special powers.
Erza might be an interesting main character for this fanfic. Given her strong will and combat skills, she could incorporate the guitar into her fighting style. For instance, she could use the guitar as a weapon, slashing enemies with the sharp edges of it while also using its music to disrupt their magic.
The girl is the central character. Then there could be a wise old woman who has knowledge of ancient magic or medicine. And perhaps a group of kids at her school who either bully her because of the tail or become her friends and support her.
The main character in the '88 girl story' is presumably the girl it's named after. However, without more information about the story, we can't know anything about her personality, her age, or what she does in the story.
It depends on the specific 'fasting girl story'. There could be many different girls in different accounts who are the main focus due to their fasting behavior.
Since it's called the 'Refugee Girl Story', the main character is likely to be a girl who is a refugee. But without more information, we can't say much more about her specific identity.
I'm not sure who the main character is without more details about the story. It could be any girl facing difficulties.
Based on the title, the main character is likely the girl. Since it's called 'the ribbon girl story', she is probably the central focus.
The main character in the 'apache girl story' is difficult to determine without more details. It could be a young girl who represents the spirit and values of the Apache people. Maybe she's a girl on the cusp of womanhood in the tribe, facing challenges that are typical for her age and situation within the Apache community. For example, she could be learning to take on more responsibilities in the tribe, and the story could be centered around her growth and development in that regard.
If the 'blue girl story' is a fable, the main character would be this girl who might be named something related to blue, like Bluebell or Azure. She could be facing challenges like dealing with mean characters in her village or trying to find a lost blue gem. However, without more details, this is just speculation.