As a natural reaction, Lucifer immediately pointed the Whisper From The Highers at Alice's neck while Nothing was holding the Dagger Of The Night tightly in his hand.
That was understandable, right? Who wouldn't be alert when a girl suddenly broke into the room of two boys?
"Wait guys, can you put down your weapons first and then we can talk?" Alice said in confusion, it seemed like she still didn't understand how serious her action just now was.
Lucifer's purpose in pointing this Wakizashi at Alice was not to kill her but to threaten her. He wanted Alice to keep in mind that if she did something that pissied Lucifer off or lied to him, her head would be separated from her neck immediately.
This way, Lucifer would receive the most honest answer from Alice.
"Answer me Alice, why are you here?" Lucifer spoke in a serious tone, without any hint of joking.