http://game.capcom.com/cfn/sfv/column/131454

http://forums.shoryuken.com/discussion/comment/11182898/#Comment_11182898

Private Nakagawa: This time we'll speak about a very real character².
She is Dan Hibiki's sister (in a parallel setting).
A good girl that worries about her carefree brother
while continuing to attend school.
She's a softball pitcher, apparently.


Basic Info:

Name: Yuriko Hibiki
Height: 169 cm
Weight: 63 kg
Blood type: A
Birthday: December, 7
Home Country: Japan
Favorite things: Cakes, Her Brother
Dislikes: Mech Gouki³, Wakame


Private Nakagawa: She is a constantly curious girl.
She is secretly following her older brother, who
travels the world bragging about his Saikyō-ryū, without him noticing.
(apparently, neither Dan, nor the player, nor the developers ever noticed)²

Yuriko has no interest in fighting at all,
and wishes her brother would settle down soon.
She sees through her brother's business ability
and wants someday to work with him
for a mail order website, something like that.
(it's a parallel setting)

¹ ROTFL, even her first name ("Lily") is a direct reference to AOF/KOF Yuri...
² I love them when they don't even try to take themselves seriously. 
³ UH-OH...

http://game.capcom.com/cfn/sfv/column/131455

http://forums.shoryuken.com/discussion/comment/11186653/#Comment_11186653

Private Nakagawa: An investigator working for the CIA.
In charge of difficult cases together with his partner Gillian.²
He's a realist man, who doesn't believe in supernatural and bizarre phenomena.³


Basic Info:

Name: David Spender¹
Height: 183 cm⁴
Weight: 72 kg⁴
Blood type: A
Birthday: October, 13⁵
Home Country: USA
Favorite things: Basketball⁶
Dislikes: Insects⁷


Private Nakagawa: He has great confidence in himself,
and is a distinguished agent with great acumen and intuition.
Outside of work, he's an unexpectedly frivolous person.
He loves basketball,
and has a mountain of his beloved home town's team goods
scattered across his desk.





¹ We all know "David" comes from the name of the actor David Duchovny. "Spender" was also the real surname of the Cigarette Smoking Man... who was Fox Mulder's biological father, indeed.
² The original name is written ジュリアン Jurian, not ジュリアナ Juriana, and Gillian Anderson's first name is consistently transcribed ジリアン Jirian in Japanese... Except they often miswrite it as ジュリアン Jurian, indeed. Jurian would be better suited as a rendition of Julianne, but it's apparent they actually wanted to use Gillian Anderson's name.
³ This is inverted from the original X-Files situation, where the "realist" one was Dana Scully.
⁴ Roughly the same height and weight David Duchovny was while acting as Fox Mulder, so... I wouldn't be surprised AT ALL if they even DID find out about (and use) Duchovny's real blood type, somehow.
⁵ Also Fox Mulder's birthday.
⁶ As did Fox Mulder, who was apparently a Brooklyn Nets fan.
⁷ As did Fox Mulder. I expect they'll lift Gillian's infos from Dana Scully/Gillian Anderson, too.

http://game.capcom.com/cfn/sfv/column/131456

http://forums.shoryuken.com/discussion/comment/11186738/#Comment_11186738

Private Nakagawa: An investigator working for the CIA.
In charge of difficult cases together with her partner David.
Actively believes in supernatural and bizarre phenomena.²
Loves occult and UFO stuff.


Basic Info:

Name: Gillian Leigh¹
Height: 167 cm³
Weight: She won't tell it
Blood type: B
Birthday: August, 9⁴
Home Country: USA
Favorite things: Japanese Anime⁵
Dislikes: Lack of Sleep⁶


Private Nakagawa: An investigator in charge of occult and strange cases.
In her childhood, she happened to experience
an encounter with "a strange living being, pure white, who could change its appearance"⁷,
She possesses a deep knowledge of cryptids and monsters.
She's a beauty, but everyone thinks of her as
"A bit strange".
Has a tremendous passion in her work,
and often argues with her colleague David.



¹ That's the definitive proof they wanted to use Gillian LEIGH Anderson's actual name. As "Leigh" is pronounced exactly as "Lee", the Japanese transcribe it as リー Rī, accordingly. But one wouldn't see the difference between a リー Rī meaning "Lee" and one meaning "Leigh" if he doesn't know beforehand... So, folks, "Juliana" is wrong, and always has been from the start. You can continue to call her Juliana Lee all you want: for me, she's Gillian Leigh.
² This is inverted from the original X-Files situation, where the "believer" one was Fox Mulder.
³ Definitely taller than Dana, though...
⁴ Also Gillian Anderson's birthday. For David they took the character's date, here they took the actress's one.
⁵ Maybe a reference to the time Gillian Anderson dubbed Maro's character in the English version of Hayao Miyazaki's Princess Mononoke.
⁶ Gillian Anderson notoriously suffered from severe sleep deprivation while acting in the first season of X-Files.
⁷ OMG. Did she encounter AMATERASU, perhaps?

http://game.capcom.com/cfn/sfv/column/131459

http://forums.shoryuken.com/discussion/comment/11191137/#Comment_11191137

Private Nakagawa: The blue shirt makes his muscles shine!
The miraculous new fighter
who uses Sawada-ryū kenkajutsu¹ and a wee bit of ninjutsu.
A man with a strong sense of justice, and straighter than a ruler!


Basic Info:

Name: Captain Sawada
Height: 175 cm²
Weight: 75 kg²
Blood type: 0²
Birthday: January, 28²
Home Country: Japan²
Favorite things: Horse Riding², Training²
Dislikes: Excuses²


Private Nakagawa: He willingly to took part to the operations for the destruction of Shadaloo.
Currently, he's traveling around the world for duty's reasons.
With his passionate heart, and a well-trained body
he beats his opponents using personal techniques.
His "Gokusatsu Jibakujin³" is a sight to behold, but
you must not imitate it.
He has a strong resistance to cold.



¹ "Sawada-style brawling techniques". 
² ALL his stats come from the real actor Ken'ya Sawada's own stats. Yes, even his blood type and the fact he dislikes excuses. 
³ "Fierce self-destruction prison killing". His  + P already shown by @EterTC.