[orpheus2]

Originally Posted by n0m@n

I checked the volume 12 spoilers and White-King is revealed to be....

Spoiler for White King:

Kuroyukihime's older sister. Her avatar name is "White Cosmos".

Originally Posted by Kunagisa

To add to n0m@n

Spoiler for 12:

• She tricked KYH into killing Red Rider, and KYH in turn tried to PK her in real life wwwww (this was hinted in vol10), which is the reason why KYH got exiled from home ("to reat her mental illness") and only a lawyer came to see her even when a car ran her over. WC did get injured. Oh yeah, she's also confirmed KYH's "parent".
  
• Crow got a new ability called Optical Conduction
  
• Lime Bell's new nickname is Watch Witch (kinda like how Raker is called ICBM sometimes). She dived into the unlimited stage and got an ability called Acoustic Summon that can gather Enemies (ability's from an item called Choir Chime).
  
• Aqua Current appear once again when Crow was attacked by Argon Array.
  
• More on Graphite Edge, he likes to give other nicknames and act totally like a kid (doesn't sound like Kirito at all tbh). He didn't have enough safe points so he decided not to get to level 9 before the other Kings. His swords are made of Hyper Diamond (hardest material in AW), can completely reflect one full on assault from KYH; extremely versatile with his swordsmanship in that he can use them to defend and attack. Since he only upgraded his swords, his body's super weak (so weak that he would lose to Ardor Maiden in close combat without 'em, and AM's already super weak close range).
  
• Red Rider, has an equipment called Arms Creation, and is also called Master Gunsmith (according to Kawahara's livecast for that episode, his battle avatar's totally a cowboy image with the horse if you missed that tiny detail). His creation has a symbol of crossed guns which acts as a safety switch, which Rider can control at will.
  
• Blood Leopard's special attack is called Vital Bite, which absorbs HP and also Mental Bite, which absorbs special attack gauge.
  
• Green Grandee has an ability called Double Payback, which is exactly like it sounds (2x reflect damage on enemy attack).
  
• Blue Knight has abilities called Pain Killer and Limit Surpass.
  
• White Cosmos is also nicknamed Transient Eternity, has 0 offensive abilities, but her IS ability makes her totally invisible, after she reached level 9, nobody can see her but other kings and her own legion. Ivory Tower also has the ability call Under Cover.
  
• Wolfram Cerberus has 3 personalities (like name suggested). Middle head wants to collect burst points only; left head has ability call Wolf Down that can copy any ability, right now he wants The Disaster.
  
• Magenta Scisscor is from Setagaya and is the first Burst Linker to install the ISS chip, but is not part of the Accel Research Committee.
  
• ISS chip before installation is black and has Red Rider's symbol on it.

Most of these info are updated in the Japanese Wiki (so for even more spoilers, I suggest you go to the Kawahara super thread on 2ch instead), I added very few other info I got elsewhere (these I'm over 80% sure is correct, but there MIGHT be some VERY minor error).

Spoiler for Reaction to List:

So the Glorious War of Sisterly Rivalry is at play here. Just replace Glorious with messy.

Watch Witch.... Shouldn't it be Time Witch instead? I guess she's more effective in Unlimited Burst Field.

Yay, more Aqua Current.

Graphite Edge is really a Glass Cannon in a very extreme way.

Unlimited Gun Works?

Seriously, Green Grandee is the true Stone Wall of Accel World. Is there anything that can harm him significantly?

Blue Knight seems to be channeling Cloud Strife from the looks of his abilities.

So White is shown to be more on stealth from the looks of the higher ups.