Her name: Detective Girl. Her reason for making a pact with a demon: to prove her hypothesis. Since she didn't make a pact to grant one of her wishes, she refused to take a new name.
Her catchphrase is "It's just like X" where "X" is a quote from a book she recently read.
She has an unwitting tendency to badger everyone she talks to into confessing their crimes, even when they haven't comitted any.
For whatever reason, she's also intent on nicknaming Cu Sith's pactmaker, Komugi, "the hellhound of the Baskervilles"...
Autoattack: Light Attack
|Rank 1/1||Deal 80 Auto Attack damage to the target (Automatic)|
Tap: Flashing Light
|Rank 1/1||Deal 295 Damage to 1 Enemy (Priority: Lowest HP), on Dark Type targets deal 100 Bonus Damage|
Slide: Ray Spark
|Rank 1/1||Deal 572 Damage to 3 Enemies (Priority: Lowest HP), heal amount (Regen, Heal) -25% for 12 seconds|
Drive: Like a Private Eye 
|Level 1||Deal 1409 Damage to 4 random Enemies, and for 10 seconds inflict Bleed (160 damage every 2 seconds)|
|ATK +500 for Light Type Allies|
|Preferred Soul Carta||Skill Oriented:|
|E||Drive Skill Voice||Quod erat demonstrandum!|
|D||Story I||How did a world-class detective like me wind up with a useless assistant like you?
I'm not expecting you to be like Watson, but after studying long enough, even he knew when something was elementary.
|D+||Weak Point Attack Voice||Kaboom!|
|D++||Critical Attack Voice||In the name of my Grandma!|
|C||Inner Voice I||Good day, my assistant!
Oh my, that look on your face... Are you being neglected at home or something?
|C+||Damaged Voice||I saw that!
|C++||Death Cry||This was one cold case...
What could I have overlooked?
|B||Story II||Heh, this is quite the paradox. A fascinating conundrum!
What sort of Child do you consider to be "good"?
|B+||Battle Start Voice||Every good detective can hold their own in a fight!|
|B++||Hot Spring Voice||Hmm, this is a tough case to crack.|
|A||Inner Voice II||Did you hear how my pactmaker cracked another case?|
|A+||Slide Skill Voice||I've got the evidence!|
|A++||Victory Voice||A true detective never gives up until the case is closed.|
|S||Story III||If you turn out to be on the criminal's side, I won't hesitate.
Is that okay with you?
|All||Inner Voice III||Hello, my assistant! We work together much better now, don't you think? We're like a modern-day Sherlock and Watson.
Now, come on! It's time to go have some fun!