What makes a good HR leader?

1) The ability to listen attentively to employee's problem 
And in order to attend to employee's problem, a good HR leader would have to create a space where it would be comfortable for the employee willingly voice out their feelings and opinions. 

2) To abid to HR policies that have been set 
For an example, if a sexual harassment policy that has been set is violated, a good HR leader would have to take responsibility to protect the co-workers involved. 

Source: 
https://www.viventium.com/7-great-hr-leadership-qualities/

HR leaders are in a unique position to help firms through transformation because they are already trusted advisors to business leaders on all things related to people and culture. In order to become a good HR leader it is essential to: 

1. An HR leader should be prepared and have a sufficient amount of knowledge as to what is about to come and invest their time to thoughtfully and strategically plan regarding how to convey critical changes in order to drive the maximum levels of understanding and commitment from the organisation.

2. HR leaders desire to be role models, and to keep pledges and commitments are among the most highly valued attributes. A good HR executives should be ensured that the individuals in the company do the right thing and follow established protocols.