a) you can't fix the problems of the past by giving her a job now
b) being a significant investor doesn't make you 'relatively high-ranking in the company.' You are either an employee with a high ranking job, or an investor. If you have no executive functions and are just an investor you are not entitled to intervene in day to day affairs unbidden.
c) It matters morally because even if she had the paper that would not entitle her to talk and harass an employee with the tacit support and protection of a senior member of the company.
