All characters in assaults fight just like normal troopers, though their characteristics are usually better. If a unit including an independent character charges into close combat the character must charge in too. Likewise if the character charges, the unit he is with charges too — inspired by his heroic example!
An independent character on their own can charge into close combat if they are within 6" of the enemy in the assault phase.
Independent Characters always fight separately to any unit they have joined or are part of. They charge just as another member of the unit but when they fight their dice are rolled separately. An Independent Character may allocate his hits between units he is Engaged with. Only enemy models engaged in combat with the Independent Character, or only able to support a model engaged in combat with the Independent Character, may strike their blows against the Independent Character.
Monstrous Creatures
Monstrous creatures are treated just like Independent Characters in an assault and always count as being a unit in their own right.