Vicissitudes
Changes or variations, typically unpleasant, in circumstances or fortune.
Implacable
Unable to be appeased or pacified.
Capricious
Given to sudden and unaccountable changes of mood or behavior.
Taciturn
Reserved or uncommunicative in speech; saying little.
Effulgent
Shining brightly; radiant.
Proclivity
A tendency to choose or do something regularly; an inclination.
Munificent
Larger or more generous than usual or necessary.
Quixotic
Extremely idealistic, unrealistic, and impractical.