“Heroes get ornery and mean when people get too close.”
οἵ ἥρωες δὲ δυσόργητοι καὶ χαλεποὶ τοῖς ἐμπελάζουσι γίνονται
Myrtilus? Not the Mythical character but a poor old comic poet with no Wikipedia page.
Myrtilus, fr. 2 (Titan-pans; Scholia to Aristophanes’ Birds)