You can choose based on the personality you want to give the girl in the story. For example, if she's strong - go for something like Brianna. If she's shy, maybe a name like Violet would work.
Think about the theme of your private story. If it's a fantasy - themed story, names like Aurora or Eira (which means snow in Welsh) could be great. Also, consider names that have personal meaning to you. Maybe your grandmother was named Rose, so you use that for the girl in the story. Another aspect is the sound of the name. Soft - sounding names like Chloe or Naomi can create a certain mood in the story.
Think about the girl's personality. If she's dreamy, something like 'Stella's Dream Diaries' could work.
Some nice names could be Lily, which represents purity and beauty. Another option is Sophia, meaning wisdom. Also, Ava, which has a modern and sweet feel.
Think about your own personality. For example, if you're a romantic person, names like 'Secret Love Tales' could work.
You could use things related to your personal interests. For example, if you like reading, you can name it 'My Bookish Escapes'. Or use inside jokes among your close friends. If there's a special moment you all shared, like a trip to a beach, name it 'Beach Memories'.
Some names could be 'Secret Sisters', 'Girls' Gossips', 'Feminine Folios'.
When choosing Spanish names for private stories, first, identify the essence of your story. Is it a love story? Then 'Amor Privado' could work. Next, consider the audience, if it's just for you, you can be more creative and use something like 'Mi Mundo Secreto' (My Secret World). Also, use Spanish adjectives that imply privacy such as 'oculto' (hidden) or 'intimo' (intimate). For example, 'Cuentos Ocultos' (Hidden Stories) or 'Aventuras Intimas' (Intimate Adventures).
Think about your own personality. If you're a bit mysterious, names like 'Shadowed Stories' could work.
Think about the origin of the name. If you like French - sounding names, names like Genevieve can be great. It has a certain je ne sais quoi. Also, look at the popularity of the name. If you want something more unique, avoid the top 10 most popular names.
You could use names like 'Girls' Secret', 'Ladies' Private Tales', 'Feminine Folklore'.
Consider the content. If it's mostly about your travels, 'Travelog Snap Secret' would be a good name. You want to pick a name that gives a hint about what's inside the private story.