She became so important to them that they wondered how they had ever managed without her in the past. And the longer she stayed with them the more indispensable she became, so indispensable in fact that their one fear was that she might some day move on.
In Halloween, I viewed the characters as simply normal teenagers. Laurie, Jamie Lee's character, was shy and somewhat repressed. And Michael Myers, the killer, is definitely repressed. They have certain similarities.
In fact, eloquence in English will inevitably make use of the Latin element in our vocabulary.