Either an AU counterpart of Casey Nezu or her possible ancestor. You decide.

Whenever a mystery needs to be solved in 1890s England, Detective Cassidy Basilton is on the case.

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Full Name: Cassidy Angela Basiltion
Age: In her early 20s
Time Era: 1800s
Species: Mouse
Orientation: possibly Heterosexual
Hair color: Tannish/Browish red??
Eye color: Jade Green
Fur color: White
Status: Single??
Residence: London, England
Best friends/allies: Revena Greyreefton
Enemies: Criminals of London, Professor Cyrilligan (main enemy)
Family: Unnamed parents, Casey Nezu (possible descendant??)
Likes/loves: Mystery, solving the crime, bringing criminals to justice, tea, crumpets, playing her violin, bathing, the Queen, Revena, suspense, mystery novels
Dislikes: Murderers, rapists, thieves, criminals getting away, losing evidence, seeing murdered victims, tampered evidence, wearing ballroom dresses, sexists