Xigbar said that he weren't as good as the past wielders and Xemnas has got Aquas armour and Mickey does know ven as he saved him by fighting the DS
xigbar is braig, xelaeus is aleus, vexen is even, and ienzo is zexion. if you read ansem reports, they were the 5 apprentices of ansem. but the english translation is a bit off.