From the wiki. More info will be updated accordingly... If anyone has additional info to give or corrections that need to be made, please help out. Thanks in advance.
Basic InfoFighting Style: Based mainly on speed attacks
Birthday: 8th April
Nationality: Unknown
Blood Type: O
Height: 177 cm
Weight: 58 kg
Fav. Food: Poultry (especially chicken)
Best Sport: Snowboarding
Impt Things: Her legs
Hated Things: Pidgeons, the Kagura clan
NormalsClose- cl.

/

/

/

are cancel-able.
- Close

does two hits making it very easy to hit-confirm into command moves or special attacks.
- Close

does two hits making it very easy to hit-confirm into command moves or special attacks.
Standing- Stand

is cancel-able/whiff cancel-able.
- Stand

does two hits and is only cancel-able while doing the move in Max Mode (

).
- Stand

does two hits and moves Mature forward.
- Stand

deceiving looks like Iori's

but does not hit low.
Crouching-

/

/

are cancel-able/whiff cancel-able.
-

/

are chain-able, but

is faster and

cannot be canceled into anything other than normals.
-

can only be blocked low.
-

is a moderately good anti-air if used early enough, it can canceled but only before her arm extends into the air
Jumping

does two hits and allows for a combo if desired. This move can be used for a cross-up if done with a hyper hop at the right distance, however, it will not combo into anything.
(more to be updated)
Blowback Attack(to be updated)
Throws:Death Blow - close

/

+

Backlash - close

/

+
Command Moves:Mature has no command moves.
Special Moves:Note: some special moves have alternate names.
Despair -

+

/

Sacrilige -

+

/

Death Row (Death Downer) -

+

/

(can be done 3 times)
Metal Massacre -

+

/

Ebony Tears -

+

/

Deceaser (Decide) -

+

/
Desperation Moves:Nocturnal Lights -

+

/
Heaven's Gate -

+

/
Super Desperation Moves:Nocturnal Lights -

+
Heaven's Gate -

+
HDSM:Ecstasy 816 -

+
Combos

,

,

(up to 3 times)

,

(two hits),

(up to 3 times)

,

,

~

(two hits),

(up to 3 times)
(more to be updated)
Changes from OG2k2- Despair (QCF+P) can be done in mid-air
- B version of Decide (HCF+K) will drag the opponent up to where Mature is standing. You can then cancel it into any special move other than Decide.
- far C uses the KOF'96 animation, and can be cancelled on the first and second hits
- HSDM has faster startup and can be comboed from strong attacks