Well, given that there's four bodyguards, of which Mr. Sanjouin is one, the natural explanation would be that the others be Jadeite (who, in the anime, energy-drained her how many times, again?), Zoicite (...imagining him as Naru's bodyguard... if there was an actual murder, I wouldn't be surprised if he was involved, really), and Kunzite.
Of course, going with the manga continuity and a very brief implication in the anime in episode #44 (the one about the history of the fall of the Moon Kingdom in the Silver Millenium), the generals in that story/timeline were brainwashed, which makes a lot of sense- the same thing happened to Endymion near the end, and they had been doing that sort of thing to random victims on a smaller scale all season (like delinquent Umino with the tarot card, or pretty much any of Nephrite's victims, or...).
In fact, according to the manga, the generals were Endymion's bodyguards (I picture them having a relationship to him comparable to that of the inner senshi with Usagi), so it's not out of the question that they be bodyguards for somebody else under different circumstances.
Of course, I could be totally wrong, and maybe it's an ecclectic team of Nephrite, Ali, Esmaraude, and Eugial...