He lunged onto Cyrus, slamming him onto the ground with a knife pressed to his throat
(oop-ok so he's THAT yandere-)
Cyrus: AHHHH!!
Leo: CYRUS!! He runs up to pull Dmitri off of Cyrus, not even realizing that it's him. Obviously this is futile, seeing that he has weak artist arms. Still, he claws at him
Leo: Get off him! W-what the fuck-I'm calling the police!!!
"R-Really!? Such a treat..watching you struggle.."
He leaned down and whispered in Cyrus's ear.
"Keep away from him..he's mine..and mine only.."
Cyrus: I-w-what...? B-but he's...my friend I-d-did you think I like him!?
Leo: Wait...D-Dmitri!? What the hell!?
"SHUT UP."
He pushed the knife down on Cyrus's neck
Cyrus: AUGH! S-stop...P-please...
He looks up at Dmitri pleadingly, tears forming in his eyes. Meanwhile, Leo has called 911
Leo: H-hello!? I-it's my friend-we were walking to work and some guy a-attacked him! I-y-yes he...he has him at knifepoint..P-please hurry...
"Leo...don't call them.."
"YOU'RE ATTACKING MY FRIEND!"
He's still holding the phone with the operator on the line, hands shaking
"I could attack you..but I'm nice.."
"L-let him go...p-please... I-I don't understand why you're doing this!"