aggressor
From LSJ
Ὁ κόσμος σκηνή, ὁ βίος πάροδος· ἦλθες, εἶδες, ἀπῆλθες → The world is a stage, life is your entrance: you came, you saw, you departed (Democritus fr. 115 D-K)
subs.
The wrong-doer: P. and V. ὁ ἀδικῶν.
Be the aggressor, be the first, v.: P. and V. ἄρχειν, ὑπάρχειν.