THRASOS was the Daimon (spirit) of excessively bold or rash action and insolence. He was associated with Ate, the malevolent spirit of delusion.
Probably ERIS though nowhere stated
Aeschylus, Agamemnon 763 ff (trans. Weir Smyth) (Greek tragedy C5th B.C.) :
"But an old Hybris (hubris) tends to bring forth in evil men, sooner or later, at the fated hour of birth, a young hubris and that irresistible, unconquerable, unholy spirit (daimon), Thrasos (Recklessness), and for the household black Ates (Curses), which resemble their parents. But Dike (Righteousness) shines in smoke-begrimed dwellings and esteems the virtuous man."
- Aeschylus, Agamemnon - Greek Tragedy C5th B.C.