[LyricalAura]

Originally Posted by Shiro Kaisen

See, it still fits that way. It was the sin that created her resentment and anger, which is what creates "Beatrice." Her resentment is amplified further by mistreatment from her masters, her being bullied into faking Kinzo's death, etc. She's had plenty of time, and she's got Genji to help out for most of the Twilights. And if she had already been planning on committing murder, of course she wouldn't have batted an eye at anything Battler said.

Beatrice's goal is not to get revenge on someone, or to cause Battler to feel fear.

Originally Posted by SeagullCrazy

I guess we could rule out Battler anyway considering he's the detective.
Battler should have been watching Jessica the whole time, too.
Eva was set up as the culprit in EP3, like a red herring, so I doubt she did it.
Then there's Nanjo. Theoretically, he could open the window, climb out with George, run all the way to the mansion, kill him, write the numbers, run all the way back, climb into the window, and go inside his room. But it would be difficult for him considering his age. He even says it himself when Battler suspects him.

Well, he would say that, wouldn't he?

If you assume both that Eva is innocent and that Nanjo can't climb out the second floor window, you get to a fairly weird place, theory-wise. It would mean that he could only escape the guesthouse through a first floor window. Note that since it is impossible to ascend to the second floor from the inside without passing through the lounge, no path exists between this window and the second floor that can be safely used when people are in the lounge.

I'll make a couple more initial assumptions:

• There are no "trick" stakes. A trick stake would make faking deaths by leaving a stake next to the body unnecessary. Therefore, anyone found with a stake in them is at the very least horribly wounded. Which means...
• Natsuhi and Krauss really were dead when they were discovered. This is confirmed by their lack of reaction when the stakes were pulled out of them.
• George was also dead when he was discovered. This is confirmed by Battler's observation of the "lack of life" in his eyes, which were open and unblinking the whole time.
• Both Natsuhi and Krauss were strangled despite Krauss having a gun, so it's likely that they got separated before they were killed. This means the killer dragged them into the arbor afterward.

If Eva's telling the truth, she only left Natsuhi and Krauss alone for a couple minutes to wash her face. We know that George went out a second floor window, and since the door was barricaded, we also know Natsuhi and Krauss went out a window, probably on the first floor. Both of these windows were locked from the inside when Battler checked, meaning that Nanjo must have locked them after everyone else left. He is the only person who could have done so, since Eva remained in the lobby except for the brief period when she was in the bathroom.

Nanjo could have snuck out a first floor window while Eva was out, but she was only gone for a few minutes at most. That isn't enough time for Nanjo to follow Krauss and Natsuhi to the arbor, strangle them, and return to the guesthouse before Eva returned to the lounge. After that point, she remained in the lounge until Jessica and Battler came looking for George, at which point Nanjo evidently came downstairs. Even though he could have snuck out, there would be no way for him to get back inside and up to his room without alerting Eva. Since he couldn't have committed any crimes, there's no reason for him to lock the windows and lie about it unless he was conspiring with Natsuhi, Krauss, or George.

With Nanjo eliminated, the only people who could have killed Natsuhi and Krauss are George, Hideyoshi, and Kyrie. Hideyoshi and Kyrie were both staked in lethal locations and there are no trick stakes, so they can't be faking and must have mortal wounds at the very least. It's highly unlikely that they'd be able to go out in the storm, overpower two people by strangling, and drag them to the arbor in that condition, so we can probably eliminate them as suspects.

That leaves only George as a potential murderer. According to Battler, he left the cousins' room to make coffee sometime between 4:00 and 5:00, but the magic scenes claimed that George flew out the window around 5:45. This is roughly the same time that Krauss and Natsuhi disappeared, so it's possible that they saw George leaving and followed him or vice versa. It is odd that they would leave without informing Eva, but we could speculate about various motives, so the possibility can't be ruled out.

So according to this logic, George murdered Natsuhi and Krauss, then went to the mansion and was murdered by Kyrie or Hideyoshi. It all happened in the space of about 15-25 minutes, which is how long it took Battler's group to arrive at the mansion. Also, only George could have staked Natsuhi and Krauss, but he has an ironclad alibi (Battler) for the earlier stakings, so there must still be another staker.