The latest issue of Famitsu magazine has revealed two more characters joining the Metal Gear Solid 4 crew.
Mei-Ling (from MGS1) has returned as a Navy officer. She will play a much larger role than she did in the original MGS.
Rosemary (from MGS2) has returned as Solid Snake's "psychological councellor" and will offer Snake advice on dealing with stress through the codec... Can anyone see the irony there?