Funny... originally, I had her down as a Lt. Commander but then I tried to think back to the command structures shown in the anime, and it seems things skew young and lower ranks save for the captain (Bright, obviously, took the chair under unusual circumstances).  And I see Duet as being fairly young (because anime)... late 20's, early 30's.<br/><br/>I'll bump her back up to Lt. Cmdr.  It probably doesn't make any real difference either way.