Nine groups of eight bytes, one group per character (including Magic Knight). The values are capped at 100:

Offset	Effect
0	Strength (bits 0-6)
1	Happiness (bits 0-6)
2	Stamina (bits 0-6) / characters-can't-move flag (bit 7, Gordon only, see routine at 53731 and trivia)
3	Charisma (bits 0-6) / can-help flag (bit 7)
4	Magic level / attribute (bits 0-6) / attribute FLASH flag (bit 7) (see trivia)
5	Character graphic index (if zero, then character is not drawn)
6	Flags
7	Index of current status text (e.g. "GORDON IS AT THE HELM CONTROL") (bits 0-3 only)

Characters' flags (byte 6) are as follows:

Bit	Effect
0	Dislikes-Starfleet flag
1	Is-artificial flag (see trivia)
2	Unused
3	Unused
4	Unused
5	Unused
6	Can't-move flag (reset = character can move / set = character can't move)
7	Asleep flag (reset = awake / set = asleep)

See also characters' initial stats at 37337.