The hydra backtracks some to the edge of Sofia's light and all four heads attack, two against Andrej and two against Ahmet.
Against Ahmet the heads roll a 7 and an 8, both missing. Andrej is not quite so lucky. The male head attacking him rolls a 15, hitting AC 1, causing 6 damage. The other head rolls a 4.
I have Andrej at 28 hit points, so he isn't stunned.
The position for both images, before and after the attack, would be the same, so here's where the party stands now:
Enrico is loaded; Lukas is free to take action, but he suffers 1 hit point more of damage.
All characters may take action.