While a character is with a unit of troops he is considered to be part of the unit in all respects. This means that if the unit flees then he must flee with them at the same speed, if the unit pursues then he must pursue, if the unit declares a charge then he must charge as part of it. Some implications of this are discussed in the following paragraph.
If a unit of troops panics, or is forced to flee because of a Fear or Terror test, then any character who is part of the unit must also flee even if he is immune to panic, fear or terror. If a unit is affected by frenzy or forced to pursue because of hatred, any character must move along with the unit but does not benefit from any bonus for these unless he is affected by frenzy/hatred himself. In other words, a character does not go into a frenzy just because he is with a unit that can do so, although he has no choice but to accompany them when they charge.
If a unit is affected by stupidity any characters must move as the unit moves, although a character can always fight normally unless he is stupid himself. Remember, a character cannot leave a unit when it turns stupid and stands still or moves stupidly because such a unit is bound by a compulsory movement rule, the character must therefore stay put. We can imagine he is trying to goad the stupid creatures into activity, or perhaps he is pinned down or hemmed in by the dribbling brutes and unable to move of his own volition.
If a character is liable to a psychological rule which doesn't apply to the rest of the unit, he must make any appropriate tests on his own and will react on his own. This can sometimes cause the character to separate involuntarily from the unit. For example if he is obliged to charge because of frenzy, compelled to pursue because of hatred, or forced to move or stand immobile due to stupidity.