Well, if Chrisof has a scroll, you should be able to transfer it to Serena through Christof. If not, you should be able to click Christof and use the use the revive cheat. Simply type "revive" in the console, assuming you have the console enabled. If you don't know what I mean, the console is activated by the ~ key. For that to work, you may need to enable that functionality. Just go to the desktop icon, right clock and select "properties". A menu will come up, go to the shortcuts tab. In the shortcuts tab, there is a "Target" line. Add a space after the last ". then type "-console" without quotes. It should look similar to my path: "G:\Vampire The Masquerade - Redemption\Vampire.exe" -console
Now when you fire up the game again, you can enable the console using the ~ key in game. Type "revive" without quotes while possessing Christof, then press enter to bring him back to full health. Alternatively, you can get a awaken scroll by typing "addthing discscroll_awaken_1" without quotes in the console, then press enter.