Character: early 14c., from O.Fr. caractere (13c., Mod.Fr. caractère), from L. character, from Gk. kharakter "engraved mark," also "symbol or imprint on the soul," from kharassein "to engrave," from kharax "pointed stake," from PIE base *gher- "to scrape, scratch." Meaning extended by metaphor to "a defining quality."
Sense of "person in a play or novel" is first attested 1660s, in reference to the "defining qualities" he or she is given by the author.
late 14c., from O.Fr. acte, from L. actus "a doing" and actum "a thing done," both from agere "to do, set in motion, drive, urge, chase, stir up," from PIE root *ag- "to drive, draw out or forth, move" (cf. Gk. agein "to lead, guide, drive, carry off," agon "assembly, contest in the games," agogos "leader;" Skt. ajati "drives," ajirah "moving, active;" O.N. aka "to drive;" M.Ir. ag "battle"). Theatrical (1510s) and legislative (mid-15c.) senses of the word also were in Latin. The verb is first attested late 15c.; in the theatrical performance sense it is from 1590s. In the act "in the process" is from 1590s, originally from the 16c. sense of the act as "sexual intercourse." Act of God "uncontrollable natural force" first recorded 1882. To act out "behave anti-socially" (1974) is from psychiatric sense of "expressing one's unconscious impulses or desires."
Well there you go.
'Never confuse movement with action' - Hemingway.