I'm sick of having Alawen dieing to bandits. What's the console command for making an NPC essential?

Never mind, found it. For some reason it wasn't on the main console page in the wiki.

However, you'll need Base ID to use that(so you need UESP wiki, or Construction Set........). If you're using OBSE, you can use 'SetRefEssential', which requires Reference ID(so you can click on actor in console mode, type SetRefEssential 1 to make the actor essential).