*slaps everyone in the face*
Some of you are FAR off!
...to quote Mr. Avellone (lead designer of K2)
"From the Casting Doc we sent to LucasArts...
PC - varies, depending on what you want your character to look like.
Atton Rand is 29-32.
Handmaiden, Disciple, and Visas Marr are all 25.
Kreia looks 50, but like Yoda, who knows.
T3 was built in K1, so he's only had 5 years of hard living.
Mandalore is 63 in Mandalorian years.
Mira is 23.
The others are not specifically referenced, but you can probably backtrack from their histories in the game to figure it out. "