"You seem to know about everything else, do tell...who did it." Says Malachite, guesturing toward Sailor Venus.
"No," you say, "I will take it from here. We all had motives for killing Queen Beryl. One way or another she did all of us an injustice. Yet, it wasn't her who was supposed to die. When I came in Malachite was in the kitchen. I found this odd, but didn't comment on the strange behavior. Now I know it was the key to this mystery. Malachite knew the only person strange enough to eat the snail and catfish appitizers was Nanny Tucket, who you discovered long ago was really Sailor Moon. You were always loyal to your leader, despite wrongs she committed against you. You blamed Zoicite's death, and your own, on Sailor Moon - you wanted revenge. You poisoned the appitizers. Unfortunately, Queen Beryl accidentally took a bit of the wrong appitizer. I noticed her chewing it earlier. She went back into the kitchen to spit it out, but it was too late. The poison had already entered her body. She died soon after. That was the reason why there were no marks on the body."
Malachite looked shock, but he knew she was right. "Well, well..he says, you figured it out. But you won't live to tell it. All of you, put your hands up."
Sailor Moon looked at him and rolled her eyes. "Moon Prism Power Make-UP!"
"Venus Love and Beauty SHOCK!!!"
"Starlight Honeymoon Therapy KISS!!!"
They made the attacks lighter than usual. They wanted him to live and suffer. Malachite was stunned by the attack, though they had only slightly knocked him out he knew the real extent of their powers and surrendered."
Police came out from all sides and he was thrown in jail without bail. As he was driven away in a patrol car you could hear him shouting. "YOU WON'T GET AWAY WITH THIS!!! YOU HAVEN'T SEEN THE LAST OF ME!!!"
You have foiled another villan and triumphed oncve more. Not to mention you got Sailor Venus' autograph. This was a story for the history books.