For all matters in their life or their life and someone's they know.
Someone who can't trust their own instincts or think for themselves.
Someone who needs a mediator to handle affairs instead of trusting and believing that they and the other party can manage it on their own.
Required Sample Sentence:
"I agree," Steve uttered, "She is quite the _________ as she tends to seek someone else's point of view before even considering her own."