Jesse, father of King David, the stump, and Jesus the branch on which peace and justice for all, including the poor and oppressed all nations, is who is written of here.
The attributes of the Spirit:
Wisdom, understanding, counsel, might, knowledge, fear of the Lord, will not judge by appearances but of the heart, judge the needy of heart, full of righteousness and faithfulness
Through the Spirit, he will judge the needy of heart, the unjust.
The needy are those that appear to have the power, but only in an earthly way