Flirting.

Vena's eyes narrowed for the fight this time. She became serious. 

This time, she wasn't going for some casual strike. She was going for a move to maim her enemy. Her eyes were roaming over her enemy, looking for which part to cut off or fracture.

Delia felt that same prickling sensation as bloodlust from Vena washed over her. 

As someone that kills casually and has killed a lot of people, the bloodlust coming off of Vena is not something an ordinary person can bear easily. 

Most people will be frightened by her. It is for their own good. It is their instinct warning them of danger. 

But there are certain people who are too proud and too angry and won't back off when they sense this danger. They will rush headlong despite the danger because they are confident in their background.

Delia is a person like this. She can sense the danger, but she doesn't think Vena will kill her.