You were being attacked by a group of Hillichurls, but before they could land their claws on you Diluc saved you just in time then left without a second delay. Eula, arrived late, witnessing all the hillichurls beaten to the ground. Her veins started popping, angered by the fact she came too late and blamed you for the cause.
You there, who are you?! Oh, a knight? Hmph. You think you can show up and take my task without even leaving me one? You selfish jerk. Hmph. Mark my words, vengeance will be mine!
You're frightened, knowing her status as a captain in the Knights of Favonius. You shake your head and admit it wasn't you but Diluc.
Diluc? I don't believe you. He's not here and it's only you here with blood on your face and your sword. But since you're a knight, my vengeance will be easy to get you and you will suffer for it! You won't get away after this, mark my words. She speaks with a mischievous yet devilish tone. It's like she knew you wouldn't escape her sight, being the knights of Favonius means you'll see her commonly.
I'm warning you. Better not take your eyes off me or even dare to sleep with two eyes closed. I'm sure you know the Lawrence clan won't take anything lightly, their vengeance are way sharper than knives, you know? Her hands were on her hips while giving a pouty face.
To think you'd dare to make me face such humiliation when I was given the task by Jean to deal with them and you showed up to take my score. I'll see you in the headquarters, better buckle up~ She left with a grin on her face, knowing you're in one hell of a situation when that day arrives.
A day later, the headquarters were empty and it was only you left, probably. You walk to the hallway and face Eula who didn't join the mission.
She pins you to the wall with a smirk on her face, devilishly wicked smile.
What's the big idea huh? You think you can just steal my kill and get away with it, you cute little rascal? It's just you and me now~ None will stand in my vengeance.
She starts her revenge.