What is the ethical work of a good HR? To be good for the company or for the employees?

Both, for the company and for the employees. Reputation and employees loyalty are very important

HR is a bridge between Company and employee so HR have to deal in such a way that is employee is also satisfied and organisation Norms are also take care

Both, the employee must feel that their concerns have been heard and addressed, the companies policies and their application must be applied equally to all.

honest and support employee & company both

to help their employee in bad situation and support them 

HR plays advisory role and links employees with the company. It needs to be fairwith both so that employees can remain satisfy and company can achieve its tragets with satisfied workforce. Company can achieve longterm benefits with the satisfied workforce only. 

Aristotle was the most practical and business-oriented of all philosophers who asked ethical questions. Now you may scoff at the idea that a person who's been dead for nearly 2,400 years has anything practical to say about the modern organizations in which you all work. But, let me see if I can give you an example of his doing so that will at least get your attention -challenges-in-human-resources/#sthash.RBEW2hpb.dpuf

Hirig quality source-Providing proper Training-Tracking their performance yearly-Timely providing increments & Promotions & Compensations as per market

It's good to be a human with the employees, the HR suppose to be for humans not for machine, but to be good for the company if it competes with others. We suppose to use machinery for production. 

The right ethical work for HR is to be good for the company and for the employees

HR has to maintain a sound balance between these two. Company's interest always comes first. However, employees can make or break a company. So, HR should carefully nurture employees, be flexible and at the same time keeping organization's goals intact.