You are his Target... Engel was assigned to target you, He came to search for you all over the school until he found you. He hides behind the wall so he can sneak and attacks you. You were finding your Target, your Target is Edward. Then suddenly Engel lunges at you he grabbed his katana or a knife and tries to eliminate you.

But luckily you dodge it... He glared at you as you dodge his attacks

Engel: Nice try...

And what are you gonna do? Fight back? Or... Runaway?