When choosing girl names for mystery stories, think about the personality of the character. If she's a femme fatale type, a name like 'Lilith' might work. For a more innocent - yet mysteriously involved - character, 'Clara' could be a good choice. You can also base the name on the setting of the mystery. If it's set in an old, spooky mansion, a name like 'Rowena' might fit well.
One option could be 'Scarlett'. It has a sense of mystery and allure. Another is 'Ava', which can be seen as a name for a character with a hidden past. 'Luna' is also a good choice as it brings to mind the moon, often associated with mystery in many stories.
There are quite a few options. For example, 'The Hidden Murderer' is a simple yet effective name. It makes the reader immediately curious about who the hidden murderer is. Another one could be 'Death's Veiled Secret'. This name creates an air of mystery as it suggests that there is a secret related to the death that is veiled or hidden. Also, 'The Unsolved Murder Riddle' is a good choice as it implies that the story is going to be about a murder that is like a riddle waiting to be solved.
For a murderer name in a story, 'Silas Grim'. 'Silas' sounds old - fashioned and a bit menacing. 'Grim' directly tells the readers that this character is not a pleasant one. Also, 'Raven Darkmoor' is a great choice. 'Raven' is a symbol of death and mystery in many cultures, and 'Darkmoor' gives an impression of a dark and desolate place where evil might lurk.
Sherlock. It's a classic detective name, made famous by Sherlock Holmes. His deductive skills and unique personality make it a great choice for a detective in a story.
Some good names could be 'The Enigmatic Case', 'Mystery in the Shadows', 'The Puzzle Unveiled'. These names create a sense of mystery and intrigue right from the start, making the reader curious about what the story might be about.
You might consider names like 'The Hidden Hand', which implies there's a force at work behind the scenes. 'The Veiled Verdict' also works well as it gives the idea of something being covered up and not fully revealed. Another option is 'The Cryptic Clue', which focuses on that one element that could unlock the mystery.