Adversary (noun)
identifies one's opponent or enemy
Belligerent (adj)
describes someone who is hostile and argumentative or confrontational
Benevolent (adj)
describes someone who has a desire to do good
Conjure (verb)
to bring to mind: to bring to the surface
Entreat (verb)
to ask in a serious and urgent way
Fickle (adj)
describes someone who changes frequently, especially as regards one's loyalties, interests, or affections.
Grievance (noun)
identifies a real or imagined wrong or reason for complaint
Melancholy (adj)
describes the feeling of deep sadness
Mercurial (adj)
describes someone who is prone to sudden and unpredictable changes of mood or mind
Pernicious (adj)
describes something that causes great damage or harm