Murana is a force of nature. When she has her eyes set on a goal, she will do whatever is necessary to accomplish it. Although the crooks and underground criminals knew she was mortal and that she could bleed and be killed, it never stopped them from begin scared shitless of her. Murana knew this and knew it wouldn't be long before her terrifying reputation would be usurped by those with enough courage, mammalpower and gall to fight back. First impressions and entrances were everything. If she had no choice but to reveal herself before making the kill, she was going to do it in style to where the sheer shock value of it would give her enough of a window of opportunity to bring everyone in the room down.
